Every tool, in one place

On-page SEO, meta tags, sitemaps, robots.txt, schema markup, and keyword research.

• .htaccess Generator Generate a ready-to-paste Apache .htaccess file with HTTPS redirect, www↔non-www, gzip, browser caching, and custom error pages.
• Barcode Lookup Look up any UPC, EAN-13, or EAN-8 barcode and see the product name, brand, category, and image (where known). Powered by the open-source Open Food Facts database.
• Competitor SEO Comparison Compare your site head-to-head against a competitor. Runs the full SEO checker on both URLs and shows where each side wins, per category and per metric.
• Domain Availability Checker Bulk-check whether domains are available to register. Paste up to 50 domains, one per line, and get instant Available / Taken status — Available results include a one-click register link.
• Keyword CPC Calculator Estimate the Google Ads cost-per-click for a keyword based on category-driven heuristics. Replaces the legacy paid Keyword CPC tool.
• Keyword Density Checker Compute the most-used 1-, 2-, and 3-word phrases on any webpage or text block with their density percentages.
• Keyword Difficulty Checker Score how hard it is to rank for a keyword. Heuristics over length, commercial intent, brand-name detection, and term concreteness.
• Keyword Position Checker Check where a domain ranks for given keywords on Google. Uses SerpApi when configured; falls back to a free DuckDuckGo lookup otherwise.
• Keywords Suggestion Tool Get the live Google Suggest auto-complete list for any seed keyword — free, no key required.
• Meta Tag Generator Generate 25+ modern meta tags — Open Graph, Twitter Card, hreflang and JSON-LD — with live Google SERP and social-card previews. Paste any URL to auto-fill from your existing page.
• Meta Tags Analyzer Inspect every <meta> tag, Open Graph property, Twitter card, canonical, and structured-data block on any webpage.
• Nobel Prize Browser Browse every Nobel Prize laureate from 1901 onward. Filter by year, category (Physics, Chemistry, Medicine, Literature, Peace, Economic Sciences) and country of birth. Data sourced from the official Nobel Prize API.
• Open All URLs Paste a list of URLs to get a clickable list and a single button that opens every link in a new tab.
• Privacy Policy Generator Generate a free, baseline privacy policy for your website. Customize site name, URL, contact email, and effective date.
• Readability Checker Score text on Flesch Reading Ease, Flesch-Kincaid grade, Gunning Fog, SMOG, ARI, and Coleman-Liau.
• Robots.txt Generator Build a valid robots.txt with crawl-delay, sitemap, and per-bot allow/disallow rules.
• SERP Preview Tool Preview how your page title, URL, and meta description appear in a Google search result. Includes pixel-width warnings.
• Schema Markup Generator Generate JSON-LD schema markup for Article, Product, FAQ, BreadcrumbList, Organization, and LocalBusiness types.
• Site-Wide Audit Run the full SEO checker across multiple pages of a site, not just the homepage, and get a site-level rollup of average score + category averages + best/worst pages. Powered by self-hosted Firecrawl.
• Social Card Preview Preview Open Graph and Twitter Card metadata for Facebook, Twitter, and LinkedIn sharing.
• Social Media Username Checker Check if a username, brand handle, or workspace name is available across 60+ networks — Instagram, TikTok, X, YouTube, Facebook, LinkedIn, GitHub, Reddit, Etsy, Shopify, Slack, eBay, Last.fm and more — in one click.
• Temporary Email Generate a disposable email address for one-time signups, free trials, and forum registrations. The address forwards to a public temp-mail inbox you can check without an account.
• Terms & Conditions Generator Generate a free, baseline Terms & Conditions document for your website with site, URL, contact, and jurisdiction fields.
• URL Rewriting Tool Convert ugly query-string URLs into clean Apache mod_rewrite rules with one command.
• Wayback Machine Lookup See historical snapshots of any URL stored by the Internet Archive Wayback Machine. Find the closest snapshot to a given date and view how a page looked over time.
• XML Sitemap Generator Crawl up to 50 internal pages from a starting URL and emit a search-engine-ready sitemap.xml.
• YouTube Tag / Keyword Extractor Extract the keywords and tags YouTube indexes for any video. Reads the public watch page metadata, no API key required.
• YouTube Thumbnail Grabber Get every available YouTube thumbnail size (default, hqdefault, mqdefault, sddefault, maxresdefault) for any YouTube URL or video ID.

Backlink discovery, authority scores, link analysis, and broken-link detection.

• Backlink Checker Estimate the inbound backlink count of a domain. Uses Moz when configured, OpenPageRank as fallback, deterministic estimate otherwise.
• Broken Links Finder Find dead links on a page or — when self-hosted Firecrawl is wired — across the whole site. Reports every HTTP 4xx / 5xx response.
• Domain Authority Checker Get the Domain Authority (DA) score of any domain. Uses Moz when configured, OpenPageRank free key as fallback, and a deterministic estimate otherwise.
• Link Analyzer List every outbound link on a page with anchor text, internal-vs-external classification, and rel="nofollow" status.
• Link Price Calculator Estimate the fair monthly cost of buying a sponsored link on a domain. Heuristic blend of estimated traffic, content volume, and outbound link count.
• Mozrank Checker Check the MozRank (link-popularity score) of any domain. Backed by the Moz API when configured, OpenPageRank free score otherwise.
• Page Authority Checker Get the Page Authority (PA) score of a URL. Uses Moz when configured, OpenPageRank free as fallback, deterministic estimate otherwise.
• Web 2.0 Profile Submission A curated playbook of 45+ high-authority Web 2.0 platforms where you can claim a free profile and link back to your site — every signup link re-verified June 2026, with accurate dofollow/nofollow notes and a copy-ready bio template.
• Website Links Count Checker Quickly count internal vs external links on a webpage. A faster, summary-only alternative to the Link Analyzer.

WHOIS, DNS records, hostname resolution, geolocation, and SSL verification.

• Bulk GEO IP Locator Look up city, region, country, ISP and ASN for up to 50 IP addresses at once.
• Class C IP Checker Resolve up to 40 domains and group them by Class C (/24) network so you can spot link-network footprints and shared hosts.
• Domain Age Checker Find out how long a domain has been registered. Pulls the registration date from the public RDAP record and reports years/months active.
• Domain Expiry Monitor Get email alerts when your domains are about to expire — or when a competitor's domain finally drops. Add up to 200 domains, choose Free weekly checks or Pro daily checks, and never lose a domain to a missed renewal again.
• Domain Hosting Checker Identify the hosting provider behind a domain by resolving its A record and looking up the reverse-DNS hostname.
• Domain Research Quick-Links Open one form, jump straight to 35+ trusted research services for any domain — WHOIS/RDAP, DNS, DNSSEC, hosting history, tech stack, backlinks, traffic, Core Web Vitals, security/threat-intel, archive snapshots and valuation. All links re-verified June 2026.
• Domain into IP Resolve any domain to its IPv4 address(es) and reverse-DNS hostname.
• Find DNS Records Look up every DNS record for a domain — A, AAAA, MX, NS, TXT, CNAME, SOA — in one query.
• My IP Address See your public IP address with country, city, ISP and map location. Free dual-stack IPv4/IPv6 lookup — no sign-up.
• SSL Certificate Checker Inspect a domain's SSL/TLS certificate: subject, issuer, validity dates, days remaining, SAN list, wildcard support, self-signed detection.
• WWW Redirect Checker Check whether a domain canonicalises to www or apex. Both versions should not return 200 — that is duplicate-content.
• What is my Browser See your browser, version, operating system, language, and screen capabilities as the server sees them.
• Whois Checker Look up domain WHOIS / RDAP details: registrar, creation/expiry dates, name servers, status flags, and registrant contact (where public).

Page speed, screenshots, source view, broken links, mobile-friendly, and crawl simulation.

• Code to Text Ratio Checker Measure how much of a webpage is HTML markup vs visible text. Higher text ratios usually indicate better content density.
• Email Privacy Scan a webpage for plain-text email addresses harvestable by spam bots. Privacy-friendly sites should obscure or omit them.
• Get Source Code of Webpage Fetch and view the raw HTML source code of any public webpage as the server would see it.
• Google Cache Checker Build the canonical Google cache URL for any page. Google retired the public cache: operator in 2024 — this tool also offers Wayback Machine + Bing fallbacks.
• Google Index Checker Estimate how many pages of a domain are indexed via a free DuckDuckGo "site:" probe — Google blocks programmatic site: searches.
• Google Malware Checker Check whether a URL is on Google Safe Browsing's malware/phishing list. Uses your Safe Browsing API key when configured; links the public Transparency Report otherwise.
• HTTP Headers Checker Inspect the HTTP response headers any URL returns, including a security-header presence score for HSTS, CSP, X-Frame-Options, and friends.
• Mobile-Friendly Test Score any URL for mobile-friendliness: viewport meta, fixed-width layouts, legible font sizes, tap targets, and Flash usage.
• Online Ping Website Tool Ping public XML-RPC blog directories to announce a freshly published URL. Modern crawlers mostly use sitemaps, but legacy directories still listen.
• Page Size Checker Measure the gzipped and uncompressed transfer size of any webpage HTML response.
• PageSpeed Insights Checker Run a real Google PageSpeed Insights Lighthouse audit against any URL and get performance, accessibility, best-practices, and SEO scores.
• Search Engine Spider Simulator See your page the way a search-engine crawler does — stripped of CSS, scripts, and images. Useful for spotting hidden or unindexable content.
• Server Status Checker Check up to 20 URLs at once. Returns HTTP status code, response time, and final URL after redirects for each.
• Tech Stack Detector Identify the CMS, JavaScript framework, server, CDN, analytics, ads, e-commerce platform and other technologies powering any website.
• Webpage Screen Resolution Simulator Preview how any webpage looks at common viewport sizes — desktop, tablet, mobile — using a live iframe.
• Website SEO Checker Audit any website for 60+ SEO, performance, mobile, and security signals — no signup, instant results.
• Website Screenshot Generator Capture a thumbnail of any URL via your self-hosted Firecrawl, WordPress mShots (free, no key), or ScreenshotMachine when configured.

Word count, case conversion, plagiarism, paraphrasing, and document builders.

• Add Line Numbers to Text Prepend numbers like "1.", "1)", or "[1]" to each line of your text.
• Anonymous Q&A Box Claim a handle and get anonymous questions from your followers. Each handle has an inbox you read in /account/ask; replies can optionally be public.
• Article Rewriter Paste any article or text and get a freshly rewritten version in seconds — unique wording, original meaning preserved. Free, no sign-up.
• Change Text Case Convert text to UPPERCASE, lowercase, Title Case, Sentence case, or aLtErNaTiNg case.
• Comma Separator Convert a list of lines into comma-separated values, or split a comma list back into lines.
• Email Signature Generator Build a clean, table-based HTML email signature that renders correctly in Gmail, Outlook, and Apple Mail.
• Email Signature Maker Build a polished, Outlook-safe HTML email signature. Pick a template, add your details and links, then copy the HTML into your mail client.
• Invisible Text Generator Generate truly empty-looking text using zero-width Unicode characters. Copy-paste it as a username, chat message, or filler when a platform requires non-empty input but you want it to render blank.
• Invoice Builder Generate a clean, printable invoice with line items, tax, and totals. Print to PDF or save the HTML.
• Line Counter Count lines, words, characters, and non-empty lines in any text.
• Numbers to Words Convert numbers to their written-out English equivalents (e.g. 123 → one hundred twenty-three).
• Plagiarism Checker AI-backed originality assessment. Submit any passage and receive a per-paragraph originality verdict, common-phrase flags, and an overall score.
• Remove Duplicate Lines Strip duplicate lines from a list — clean keyword lists, URLs, or email exports in one click.
• Resume Builder Build a clean, ATS-friendly résumé from a simple form. Print to PDF when you're done.
• Reverse Text Generator Reverse text character-by-character, word-by-word, or line-by-line.
• Roman Numerals Converter Convert between Arabic numbers (1, 2, 3…) and Roman numerals (I, V, X, L, C, D, M).
• Small Text Generator Convert text to tiny superscript, subscript, or small-caps Unicode variants for social bios and comments.
• Text Diff Checker Compare two blocks of text line-by-line. Highlights added, removed, and unchanged lines with totals.
• Text to Binary Converter Convert text to 8-bit binary representation, or decode binary back to text.
• Upside Down Text Generator Flip text upside-down using Unicode. Works on social media bios, comments, and most messaging apps.
• Word Counter Paste any text to instantly count words, characters, sentences, paragraphs, and estimated reading time.
• Word Counter Pro Word, character, sentence, paragraph, syllable, reading-time, and keyword-density analysis with top-10 frequency table.

AI-powered generators for SEO copy, ads, social posts, emails, and pitches.

• AI Ad Description Writer Generate 5 PPC ad descriptions under 90 characters. Pairs well with the AI Ad Headline Generator for full-asset Google/Meta campaigns.
• AI Ad Headline Generator Generate 15 PPC ad headline options under 30 characters — perfect for Google Ads, Facebook Ads, and LinkedIn campaigns.
• AI Article Intro Writer Generate three intro paragraph variations for a blog post or article. Hook + value-promise + transition format.
• AI Article Outline Generator Build a publish-ready outline with H2/H3 headings, key points per section, and a suggested word count for each block.
• AI Blog Ideas Generator Generate 15 blog post ideas for a niche, mixed across the awareness, consideration, and decision funnel stages.
• AI Blog Title Generator Get 10 click-worthy blog title variations covering listicle, how-to, contrarian, and curiosity angles.
• AI Business Name Generator Generate 12 brandable business name candidates with style notes and likely .com availability commentary.
• AI CTA Button Text Generator Generate 12 click-worthy call-to-action button text variants under 25 characters.
• AI Company Bio Writer Generate three lengths (short, medium, long) of company bio copy from a single brief. Useful for press kits, About pages, and directory listings.
• AI Content Detector Estimate whether a passage was AI-written. Heuristic score over sentence-length burstiness, repetition rate, average word length, and known AI-favorite phrases.
• AI Contract Clause Writer Draft a plain-English contract clause covering the situation you describe. Output is a starting draft for your lawyer to review — never a substitute for legal counsel.
• AI Cover Letter Writer Draft a tailored cover letter from a job description and your background. AI matches your relevant experience to each requirement.
• AI Elevator Pitch Writer Generate three elevator pitch lengths — 30-second, 60-second, and a written 2-paragraph version — from one company brief.
• AI Email Body Writer Draft a complete email body from a single brief. Choose tone (sales, follow-up, cold, support) and the AI handles structure.
• AI Email Subject Line Generator Generate 10 high-open-rate email subject lines under 50 characters covering urgency, curiosity, and personalisation patterns.
• AI FAQ Generator Generate 8 frequently-asked questions with crisp answers for any product, service, or topic. Output is FAQPage JSON-LD-ready.
• AI Hashtag Generator Generate a balanced mix of 30 high-, mid-, and low-volume hashtags appropriate to your post topic and platform.
• AI Humanizer Rewrite stiff, AI-flavored text into a more natural, human voice without changing the meaning.
• AI Instagram Caption Writer Generate 3 Instagram caption variations with hook, body, and 8-12 hashtags appropriate to the content.
• AI Job Description Writer Draft a complete job description with role summary, responsibilities, requirements, nice-to-haves, and benefits.
• AI Keyword Cluster Ideas Take a seed keyword and get 5 topical clusters, each with 8-10 long-tail keyword ideas grouped by user intent.
• AI Landing Page Hero Writer Generate a complete hero section: headline, sub-headline, three benefit lines, and primary CTA button text.
• AI LinkedIn Post Writer Draft a complete LinkedIn post with hook, story arc, and CTA. Optimised for the LinkedIn dwell-time algorithm.
• AI Paraphraser Paraphrase text in a chosen tone — formal, conversational, simpler, or fluent — preserving the original meaning.
• AI Product Description Writer Write a complete e-commerce product description with hero copy, feature bullets, and an FAQ section.
• AI Product Features Generator Turn raw product specs into 8 customer-facing benefit-led feature bullets.
• AI SEO Meta Description Generator Generate 5 compelling meta descriptions under 155 characters from a page topic and primary keyword.
• AI SEO Meta Title Generator Generate 5 SEO-optimised meta title options under 60 characters from a page topic and primary keyword.
• AI Social Proof Writer Generate 5 testimonial-style social proof snippets for landing pages and ad creatives — written from the customer's perspective with concrete benefits.
• AI Startup Idea Generator Generate 5 startup ideas in a chosen industry. Each idea includes the problem, the solution, the target buyer, and a quick sense of business model.
• AI Tagline Generator Generate 10 brand tagline variants — short, memorable, and benefit-led.
• AI Text Expander Expand a sentence or short paragraph into a longer, more detailed passage without inventing facts.
• AI Text Summarizer Summarise long text into a TL;DR plus a 5-bullet key-points list at three lengths: short, medium, or long.
• AI Tone Changer Rewrite text in a different tone — formal, friendly, persuasive, witty, empathetic, or assertive — without changing meaning.
• AI Tweet Generator Generate 5 tweet variants under 280 characters from a single topic — including a thread-starter and a contrarian take.
• AI Value Proposition Generator Generate three value-proposition statements following the proven "for [audience], who [need], we are [category] that [benefit]" formula.
• AI YouTube Description Writer Draft a complete YouTube video description: hook line, expanded summary, chapter timestamps placeholder, and end-screen CTA.
• AI YouTube Title Generator Generate 10 click-worthy YouTube video titles under 70 characters covering tutorial, listicle, transformation, and curiosity angles.
• Resume Bullet Rewriter Turn weak résumé bullets into strong, action-verb-led, metrics-driven statements that hiring managers actually read.
• YouTube Summarizer Summarize a YouTube video using its title and description. Outputs a short bullet list of the key points.

Resize, crop, rotate, compress, format-convert, OCR, background removal.

• AI Image Generator Turn a text prompt into a unique AI-generated image — free, no sign-up, no watermark. Pick an aspect ratio, style preset, and model, then download the PNG.
• Background Remover Remove image backgrounds entirely in your browser using the Xenova/modnet model (Apache 2.0). Your image never leaves your device.
• EXIF Metadata Remover Strip every EXIF tag from a JPEG or PNG (camera, GPS, timestamps) and download the cleaned image. Files are processed in-memory.
• EXIF Metadata Viewer Read every EXIF tag from a JPEG or TIFF: camera model, GPS, timestamps, lens settings, copyright. Files stay on the server only for the request.
• Favicon Generator Turn any image into a multi-size favicon ZIP — 16, 32, 48, 64, 96, 128, 152, 180, 192, 256, 512 px PNGs plus a Windows-friendly favicon.ico.
• HEIC → JPG Converter Convert iPhone HEIC photos to universally supported JPG. Files are processed on the server and never stored.
• Image Compressor Reduce JPEG, PNG, or WebP file size by re-encoding at a chosen quality. See before/after sizes side-by-side.
• Image Cropper Crop an image to a specific rectangle. Specify x/y offset and width/height in pixels.
• Image Format Converter Convert any image between JPEG, PNG, WebP, GIF, and BMP. Perfect for swapping legacy formats to modern WebP for smaller files.
• Image Resizer Resize a JPEG, PNG, or WebP image to exact dimensions or scale to fit a max width while preserving aspect ratio.
• Image Rotator / Flipper Rotate any image by 90/180/270 degrees or flip it horizontally / vertically. Useful for fixing camera-rotated EXIF orientation.
• Image to Text (OCR) Extract text from screenshots, scanned documents, and photos using Tesseract OCR.
• Meme Maker Caption an image with top + bottom text, share the permalink. Free, with optional watermark and PNG download.
• Placeholder Image Generator Generate placeholder images at any size with custom background color, text color, and label. Useful for layout mockups and lorem-ipsum-of-images.

Merge, split, and remove pages from PDF files.

• Images to PDF Combine up to 30 JPEG / PNG images into a single PDF document. Each image becomes one page sized to fit the image while preserving aspect ratio.
• PDF Compressor Shrink PDF file size. Uses Ghostscript when available for deep compression with image quality control; falls back to FPDI re-encoding (5-15% savings) otherwise.
• PDF Merger Combine multiple PDF files into a single document. Drag files into the order you want them merged.
• PDF Organize Pages Reorder the pages of a PDF — type the new page order (e.g. "3,1,2,4") and download the reorganized document. Every original page must appear exactly once.
• PDF Page Numberer Add page numbers to every page of a PDF. Pick the format ("Page 1 of 10"), position (corner or center), font size, and color. Download the numbered PDF instantly.
• PDF Page Remover Delete specific pages from a PDF and download the trimmed result. Accepts ranges like "2,5-7".
• PDF Splitter Extract specific pages or page ranges from a PDF into a new file. Accepts ranges like "1,3-5,8".
• PDF Unlock Remove print/copy/edit restrictions from PDFs. Re-saves the document as an unrestricted copy — for AES-encrypted PDFs that need a password to open, please decrypt them first in your viewer and re-upload.
• PDF Watermark Stamp a diagonal text watermark across every page of a PDF — pick the text, color, opacity, rotation and font size, and download the watermarked file.
• PDF to Images Render every page of a PDF as a PNG or JPEG image. Output is a ZIP of one image per page. Requires Imagick + Ghostscript on the server.

JSON, XML, base64, JWT, regex, UUID, slug, QR-code, and encoder utilities.

• Base64 Encoder / Decoder Encode text to Base64 or decode Base64 back to text. URL-safe mode supported.
• C Compiler Compile and run C code in your browser via gcc. Type or paste your program, optionally provide stdin, and see compile errors plus stdout/stderr from the run. Powered by the public Wandbox sandbox.
• CSV to JSON Converter Convert CSV (with header row) into a JSON array of objects.
• Countdown Timer Create a shareable, embeddable countdown to any future date — for product launches, event start times, deals, deadlines. Free and unlimited.
• HTML Entity Encoder / Decoder Encode HTML special characters (&lt; &gt; &amp; " ') or decode them back to plain text.
• HTML Live Editor Edit HTML, CSS, and JavaScript with a live preview. Sandboxed iframe — your code runs safely in your browser without touching this site. No sign-up, no save server-side.
• JSON Formatter Pretty-print, minify, or validate JSON with detailed error reporting.
• JSON to CSV Converter Convert a JSON array of objects into CSV with auto-detected headers.
• JSON to XML Converter Convert a JSON document to XML with a configurable root element.
• JWT Decoder Decode a JSON Web Token header and payload (no signature verification).
• Markdown to HTML Converter Convert Markdown to HTML (headings, bold, code, lists, links). Powered by CommonMark for spec-correct output.
• Poll Maker Run a quick public poll with live results. 2-10 options, single or multi-select, optional close date. No signup to create; voters get 1 vote per IP.
• Python Compiler Run Python 3 code in your browser — type or paste a script, optionally provide stdin, and see stdout/stderr. Powered by the public Wandbox sandbox; no install needed.
• QR Code Decoder Decode QR codes from any image. Decoding runs in your browser via jsQR — your image never leaves your device.
• QR Code Generator Free QR code generator — encode URLs, plain text, vCards, Wi-Fi credentials, email, phone, SMS, or calendar events. Customize size, error correction, and colors. Download as PNG, JPG, or SVG.
• Random Wheel Spin a wheel of choices to pick a winner — for raffles, decisions, kid-friendly contests, or "what should we eat tonight?". Shareable + re-spinnable.
• Shareable QR Code Generate a re-pointable QR code with scan analytics. Unlike a static QR generator, the destination can be changed later — useful for posters, packaging, and business cards where reprinting is expensive.
• Slug Generator Convert any string into a URL-friendly slug (lowercased, transliterated, hyphenated).
• URL Encoder / Decoder Percent-encode or decode any URL, query string, or path segment. Toggle between RFC 3986 and form-encoded modes.
• URL Shortener Free URL shortener with QR codes, custom slugs, password protection, link expiration, and click analytics. No signup required to create — sign up free to track clicks (countries, devices, time chart).
• UUID Generator Generate RFC 4122 version 4 UUIDs — cryptographically random, batch up to 100.
• XML to JSON Converter Parse XML and output as JSON (attributes, text content, and nesting preserved).

Mortgage, BMI, age, tip, percent, plus length, weight, currency, and unit converters.

• Age Calculator Calculate exact age in years, months, and days from a date of birth.
• Area Converter Convert square meters, acres, hectares, square feet, and more.
• Average Calculator Compute mean, median, mode, min, max, range, sum, and standard deviation of a set of numbers.
• BMI Calculator Compute Body Mass Index plus the WHO category from your weight and height (metric or imperial).
• Bill Splitter Split a bill (including tip) across friends and share a permalink to the breakdown. Optional custom per-person amounts for the people who ordered extra.
• Byte Converter Convert bits, bytes, KB, MB, GB, TB, PB and binary (KiB, MiB, GiB).
• Compound Interest Calculator Compute compound interest over time with monthly, quarterly, or annual compounding frequencies.
• Currency Converter Convert between major world currencies using daily-cached ECB reference rates.
• Currency Converter Widget Create a live currency-converter widget you can embed on any web page. Pick a base currency and the quote currencies to show.
• Discount Calculator Find the sale price and total savings from an original price and discount percentage.
• Fun Facts About You Enter your birth date and (optionally) your name to discover fun facts about yourself: zodiac sign, day of the week you were born, total heartbeats so far, distance Earth has travelled around the Sun since your birth, and more.
• Length Converter Convert meters, feet, inches, miles, kilometers, yards, and more.
• Loan / EMI Calculator Monthly loan, mortgage, or EMI payment calculator using the standard amortization formula.
• Percentage Calculator Compute X% of Y, what percent X is of Y, or percent change between two numbers.
• Power Converter Convert watts, kilowatts, horsepower, BTU/hour, and more.
• Pressure Converter Convert pascals, bars, PSI, atmospheres, mmHg, and Torr.
• Speed Converter Convert m/s, km/h, mph, knots, and feet per second.
• Temperature Converter Convert Celsius, Fahrenheit, Kelvin, and Rankine temperatures.
• Time Converter Convert seconds, minutes, hours, days, weeks, and years.
• Time Zone Converter Convert any time between any two (or three) world time zones — DST-accurate, with live clocks, an hour-by-hour chart, and a meeting planner.
• Tip Calculator Split a restaurant bill: compute tip and per-person amount for any party size.
• Torque Converter Convert Newton-meters, pound-feet, kgf-meters, and ounce-inches.
• Voltage Converter Convert microvolts, millivolts, volts, kilovolts, and megavolts.
• Volume Converter Convert liters, gallons, cups, fluid ounces, cubic meters, and more.
• Weight Converter Convert grams, kilograms, pounds, ounces, stones, and more.

Hex/RGB/HSL/CMYK conversion, contrast checker, palette and shade generators.

• CMYK Converter Convert hex or RGB into CMYK (cyan, magenta, yellow, key) for print-ready output.
• Color Palette Generator Generate complementary, analogous, triadic, tetradic, or split-complementary palettes from one base color.
• Color Picker Interactive color picker with live HEX, RGB, HSL, and CMYK output. Browser-native picker with one-click copy.
• Color Shades Generator Generate a gradient of lighter and darker shades from a base color — perfect for design systems.
• Contrast Ratio Checker (WCAG) Check foreground/background color contrast against WCAG AA and AAA accessibility guidelines.
• HSL to Hex Converter Convert HSL values (hue, saturation, lightness) to a hex code — plus the equivalent RGB and CMYK.
• Hex / RGB Color Converter Live HEX ↔ RGB ↔ HSL ↔ HSV ↔ CMYK ↔ HWB ↔ OKLCH converter with WCAG contrast, 10-step shade & tint palettes, color harmonies, and exportable CSS / SCSS / Tailwind / JSON tokens.
• Hex to HSL Converter Convert hex color codes to HSL (hue / saturation / lightness) — plus RGB and CMYK.

Password generation, hashing, blacklist lookup, and domain reputation checks.

• Bcrypt Password Hash Generate a bcrypt hash of a password, or verify a plaintext against an existing hash.
• Blacklist Lookup Check whether a domain or IP is listed on Spamhaus, SpamCop, Barracuda, SORBS, UCEPROTECT, or CBL DNSBLs.
• HMAC Generator Compute a Hash-based Message Authentication Code (HMAC) using a secret key.
• Hash Generator Compute MD5, SHA-1, SHA-256, SHA-512, and SHA3 hashes of any input.
• Online MD5 Generator Generate the 32-character MD5 hash of any text or string. Useful for checksums and legacy verification.
• Password Generator Generate strong, cryptographically random passwords with configurable character sets.
• Password Strength Checker Estimate password entropy, time-to-crack at 10 billion guesses/sec, and highlight weaknesses.
• Random String Generator Generate cryptographically random strings — hex, base64, alphanumeric, or numeric-only.
• Suspicious Domain Checker Run a quick reputational check combining heuristics (TLD, length, hyphenation, look-alike chars) with a DNSBL spam-list lookup.