All Tools

Generate an EAN-13, EAN-8, UPC-A, Code 128, or Code 39 barcode from a value and download it as an SVG. Free, instant, browser-based.

Scan a barcode from an uploaded image or your camera and read the value it encodes, entirely in your browser.

Validate the check digit of a GTIN-8, GTIN-12, GTIN-13, or GTIN-14 product identifier. Free, instant, browser-based.

Check whether an ISBN-10 or ISBN-13 book number has a valid checksum. Free, instant, browser-based.

Convert a 10-digit ISBN to its 13-digit form or back, recomputing the check digit automatically. Free, instant, browser-based.

Validate the check digit of a UPC-A, EAN-13, or EAN-8 retail barcode number. Free, instant, browser-based.

Calculate the expected check digit for a VIN, or validate an existing VIN's check digit. Free, instant, browser-based.

Decode a 17-character VIN into its make, model, model year, and manufacturing plant. Free, instant, powered by NHTSA's vPIC database.

Encrypt or decrypt text with AES-256-GCM using a passphrase, entirely in your browser via the Web Crypto API.

Encode text to Base64 or decode Base64 back to plain text, instantly, entirely in your browser.

Hash a password with bcrypt at a chosen cost factor, or verify a password against an existing bcrypt hash — entirely in your browser.

Minify CSS by removing whitespace and redundancy, entirely in your browser.

Convert CSV to JSON or JSON to CSV, instantly and entirely in your browser, with proper handling of quoted fields, commas, and custom delimiters.

Pick a color and instantly see its HEX, RGB, and HSL values, entirely in your browser.

Build a valid 5-field cron expression from simple dropdowns, with a plain-English description of exactly when it will run.

Paste a 5-field cron expression and get back a plain-English description of exactly when it runs.

Check whether an email address has appeared in a known data breach, with the breach name, date, and what data was exposed.

Escape special characters to HTML entities, or decode HTML entities back to plain text, for safely embedding text in HTML.

Minify HTML by stripping comments and collapsing whitespace, entirely in your browser.

Identify a hash's algorithm from its length and check it against a list of common passwords, entirely in your browser.

Generate SHA-1, SHA-256, SHA-384, or SHA-512 hashes of any text, computed locally in your browser using the Web Crypto API.

Convert images between PNG, JPEG, and WebP formats, entirely in your browser — no upload required.

Format, validate, and beautify JSON online. Fast, free, and runs entirely in your browser.

Convert JSON to YAML or YAML to JSON, instantly and entirely in your browser, with clear error messages when the input isn't valid.

Decode a JSON Web Token's header and payload to inspect its claims, entirely in your browser — no secret required.

Create a signed JSON Web Token from a payload and secret using HS256, HS384, or HS512, entirely in your browser.

Convert a number between binary, octal, decimal, and hexadecimal at once — paste one value and see all four bases side by side.

Generate strong, random passwords with customizable length and character sets, and check any password's strength — entirely in your browser.

Generate a QR code from any text or URL, entirely in your browser, and download it as an image.

Generate a 2048- or 4096-bit RSA key pair in PEM format for signing or encryption, entirely in your browser.

Test a regular expression against sample text and see every match highlighted, instantly, without leaving your browser.

Format and beautify SQL queries online — proper indentation, clause breaks, and keyword casing, entirely in your browser.

Convert between Unix timestamps and human-readable dates, in UTC and your local timezone, instantly in your browser.

Encode or decode a string or URL for safe use in query strings and URLs, with both component and full-URI encoding modes.

Build campaign tracking URLs with UTM source, medium, campaign, term, and content parameters, entirely in your browser.

Generate random, RFC 4122 version 4 UUIDs, one at a time or in bulk, entirely in your browser.

Get a temporary URL that captures every HTTP request sent to it — method, headers, query string, and body — so you can debug a webhook without deploying anything.

Convert XML to JSON or JSON to XML, instantly and entirely in your browser, with a clear, predictable mapping between attributes, text, and repeated elements.

Check whether a domain publishes a DKIM record for a given selector and see its exact contents. Free, fast DKIM record lookup with no signup required.

Check whether an email address uses a known disposable or temporary-mail domain. Free, instant check with no signup required.

Pull every email address out of pasted text, log files, or HTML, deduplicated and ready to copy. Free, instant, all in your browser.

Check an email address's syntax and confirm its domain has mail servers configured to receive mail. Free, instant, no signup required.

Run MX, SPF, DMARC, and (optionally) DKIM checks on a domain in one pass and get a plain-language pass/fail report. Free, instant, no signup required.

Calculate the Compound Annual Growth Rate (CAGR) between an initial and final value over any number of years.

Calculate how an investment grows over time with compound interest — enter principal, rate, compounding frequency, and duration.

Calculate your monthly loan installment (EMI), total interest, and total repayment for any loan amount, rate, and term.

Add or remove GST (Goods and Services Tax) from an amount at any rate — see the tax amount and the total or base value instantly.

See what today's amount will cost in the future, and how much its purchasing power shrinks, at any inflation rate.

Calculate percentages three ways — find X% of a number, what percent one number is of another, or the percentage change between two numbers.

Calculate return on investment (ROI) and annualized return from an initial investment amount, final value, and holding period.

Estimate the retirement corpus you'll build from your current savings and monthly contributions by the time you retire.

Calculate the future value of a monthly SIP (Systematic Investment Plan) — see total invested, wealth gained, and the maturity value.

Convert a salary between hourly, daily, weekly, monthly, and annual figures based on your work schedule.

Calculate the tip amount, total bill, and per-person share for any bill amount, tip percentage, and party size.

Convert images to and from AVIF — a modern, royalty-free format that beats JPEG and WebP on file size at the same quality.

Crop a PNG, JPEG, or WebP image to an exact pixel region, entirely in your browser — no upload required.

Convert HEIC and HEIF photos from an iPhone or iPad into JPEG, PNG, or WebP so they open anywhere.

Shrink PNG, JPEG, or WebP files with server-side compression that beats what a browser can do on its own.

Scan a QR code from an uploaded image or your camera and read the text it contains, entirely in your browser.

Resize a PNG, JPEG, or WebP image to exact pixel dimensions, entirely in your browser — no upload required.

Shrink SVG markup by stripping unnecessary metadata, comments, and redundant precision — paste SVG code or upload a file.

Look up which Autonomous System (ASN) an IP address belongs to, or look up an ASN's registration details directly. Free, fast, no signup.

Check whether a domain or IPv4 address is listed on major DNSBL/RBL spam blacklists like Spamhaus, Barracuda, and SORBS. Free, instant, no signup required.

Check whether a URL's CORS response headers would allow a cross-origin request from your app. Free, fast, no signup.

Look up any country's ISO codes, calling code, and official currency in one searchable reference table. Free, instant, entirely in your browser.

Check whether a domain has a DMARC policy and see its exact contents. Free, fast DMARC record lookup with no signup required.

Look up A, AAAA, CNAME, MX, TXT, NS, and SOA records for any domain. Fast, free DNS record checker with no signup required.

Check a domain's DNS records against several major public resolvers at once to see whether a recent change has propagated. Free, fast, no signup.

Get a single 0-100 health score for a domain, combining its DNS, SSL certificate, SPF, DMARC, and security-header status in one check.

Find out how old a domain is from its RDAP registration date. Free, instant domain age lookup with no signup required.

Check whether a domain is registered or available via RDAP. Free, instant domain availability check with no signup required.

See the exact HTTP response headers a URL returns, including every redirect hop along the way. Free, fast, no signup.

Check the HTTP status code a URL returns, and trace every redirect hop along the way. Free, fast, no signup.

Look up an IP address's approximate location, timezone, and ISP or hosting provider. Free, fast, no signup.

Look up the hardware manufacturer registered for a MAC address's OUI prefix. Free, fast, no signup.

Look up the MIME type for a file extension, or the extension for a MIME type. A curated reference of the most common types. Free, instant, entirely in your browser.

Look up a domain's mail exchange (MX) records to see where its email is routed. Free, fast, no signup required.

See exactly which Open Graph and Twitter Card tags a URL serves, the same way a social platform's link unfurler would. Free, fast, no signup.

Find out which registrar a domain is registered through via RDAP. Free, instant registrar lookup with no signup required.

Look up the reverse-DNS (PTR) hostname registered for an IP address. Free, fast, no signup required.

Fetch and parse a site's robots.txt into readable rules — user agents, disallowed paths, and linked sitemaps. Free, fast, no signup.

Check whether a domain has an SPF record and see its exact contents. Free, fast SPF record lookup with no signup required.

Check a domain's SSL/TLS certificate — issuer, expiry date, and validity — by connecting directly on port 443. Free, fast, no signup.

Fetch and structurally validate an XML sitemap — confirms it's well-formed, has the right root element, and every entry has a location. Free, fast, no signup.

Browse and search top-level domains — gTLDs, ccTLDs, and popular new gTLDs — with their registry and a short note on each. Free, instant, entirely in your browser.

Check which TLS protocol versions a domain supports and which one it negotiates by default. Free, fast, no signup.

Break a URL down into its protocol, host, port, path, query string, and fragment. Free, fast, runs entirely in your browser.

Look up a domain's registrar, registration status, key dates, and nameservers via RDAP. Fast, free WHOIS lookup with no signup required.

Look up the postal code format used by any country — pattern, structure, and example. Free, instant, entirely in your browser.

Shrink a PDF's file size by deduplicating and compressing its internal structure — free, fast, nothing stored.

Convert an Excel workbook (.xls or .xlsx) to PDF — free, fast, nothing stored.

Password-protect a PDF with real, standards-compliant AES-256 encryption — free, fast, nothing stored.

Combine multiple PDF files into a single document, in the order you choose — free, fast, and nothing stored.

Convert a PDF into an editable Word (.docx) document — free, fast, nothing stored.

Convert a PowerPoint presentation (.ppt or .pptx) to PDF — free, fast, nothing stored.

Rotate every page of a PDF by 90, 180, or 270 degrees — free, fast, and nothing stored.

Split a PDF into separate files by page range, or break every page out on its own — downloaded as a ZIP.

Remove password protection from a PDF you already know the password to — free, fast, nothing stored.

Convert a Word document (.doc or .docx) to PDF — free, fast, nothing stored.

Scan any webpage for broken links. Checks every href on the page and reports 404s, server errors, and unreachable URLs. Free, no signup.

Check the canonical URL tag of any webpage. Instantly see the rel=canonical link element a page declares to search engines. Free, no signup.

Analyze word frequency and keyword density in text or HTML code. Uncover 1-word, 2-word, and 3-word phrase distribution instantly.

Generate HTML meta tags for your website. Optimize SEO, Open Graph (OG), and Twitter Cards layout with a live HTML preview. Free, client-side, instant.

Trace the full redirect chain of any URL. See every hop, HTTP status code, and the final destination. Free, no signup.

Preview how your webpage looks in Google search results. See your title, URL, and description as Google would display them — free, instant, no signup.

Generate JSON-LD structured data markup for rich search results. Supports Article, LocalBusiness, Product, FAQ, BreadcrumbList, and more.

Generate a valid XML sitemap from your list of URLs. Set priority and change frequency per URL, then download or copy the finished sitemap.xml file.

Slice a wide banner image into numbered panels for an Instagram grid or LinkedIn/Instagram carousel, and download as a ZIP or PDF — entirely in your browser.

Write once and check your character count against X, Instagram, Threads, and LinkedIn limits at the same time, with Unicode bold/italic/monospace styling — entirely in your browser.

Turn a quote, line of text, or link into a styled shareable graphic with gradient backgrounds and optional window chrome, entirely in your browser.

Generate platform-tagged campaign links with QR codes for every channel in one pass — YouTube, Instagram, TikTok, and more — entirely in your browser.

Preview how TikTok, Reels, Shorts, and Snapchat UI chrome overlaps your image so captions and key visuals aren't hidden — entirely in your browser.

Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and more — instantly, entirely in your browser.

Count characters as you type and check the result against Twitter/X, SMS, meta description, and other common character limits — instantly, in your browser.

Compare two blocks of text line by line and see a unified, git-style diff with added and removed lines highlighted, instantly in your browser.

Remove duplicate lines from any list — email lists, keyword lists, CSV columns — with case-insensitive and whitespace-aware matching, entirely in your browser.

Generate placeholder Lorem Ipsum text by paragraphs, sentences, or words — for mockups, layouts, and drafts — entirely in your browser.

Write Markdown with a formatting toolbar and see the rendered HTML preview live — export as .md or .html, entirely in your browser.

A distraction-free notepad with basic formatting, multiple notes, and automatic browser-local saving — sign in only if you want a note backed up to your account.

Generate random strings with a custom length and character set — for test data, placeholder IDs, and sample values — entirely in your browser.

Turn any title or phrase into a clean, URL-safe slug — lowercase, hyphenated, accent-stripped — instantly, entirely in your browser.

Compare two pieces of text and see exactly what changed, with word-level additions and deletions highlighted inline, instantly in your browser.

Count words, characters, sentences, and paragraphs in your text, with estimated reading time — instantly, entirely in your browser.

Calculate exact age in years, months, and days from a date of birth, as of today or any date you choose. Free, instant, private.

Convert between square meters, square feet, acres, hectares, and other area units instantly. Free, accurate, browser-based.

Calculate the mean, median, mode, min, max, and sum of a list of numbers. Free statistics calculator, runs in your browser.

Convert between bits, bytes, KB, MB, GB, TB, and their binary (KiB/MiB/GiB) equivalents instantly. Free, accurate, browser-based.

Add or subtract days, weeks, months, or years from a date and get the resulting calendar date, including the day of the week.

Find the exact number of days, weeks, and business days between two dates. Free calendar calculator, runs entirely in your browser.

Add, subtract, multiply, or divide two fractions and get the result simplified to lowest terms, plus its decimal equivalent.

Convert between kilometers, meters, miles, feet, inches, and other length units instantly. Free, accurate, runs in your browser.

A browser-based checklist tool with categories, drag-to-reorder, and a progress indicator — sign in only if you want a list backed up to your account or exported as PDF/Excel.

Convert a number into its written-out English words, in international (million/billion) or Indian (lakh/crore) numbering.

Generate one or more random numbers within a range, with or without duplicates. Free, uses your browser's cryptographic RNG.

Simplify a ratio to its lowest terms, or solve for a missing value in a proportion like A:B = C:?. Free and instant.

Set a reminder for a specific date and time and get a real browser notification when it's due — works even if you've closed the tab.

Convert numbers to Roman numerals or Roman numerals back to numbers, for values from 1 to 3999. Free, instant, browser-based.

Convert between km/h, mph, m/s, and knots instantly. Free speed and velocity converter, runs entirely in your browser.

A browser-based to-do list with priority, due dates, tags, and recurring tasks — sign in only if you want your tasks backed up to your account.

Convert between Celsius, Fahrenheit, and Kelvin instantly. Free temperature converter that runs entirely in your browser.

Calculate the exact duration between two date-and-time values, broken down into days, hours, and minutes.

Convert a date and time from one time zone to another, using each zone's current UTC offset. Free, instant, runs in your browser.

Convert between length, weight, area, volume, speed, data storage, and temperature units, all from one page. Free and instant.

Convert between liters, milliliters, gallons, cups, and other volume units instantly. Free, accurate, runs entirely in your browser.

Convert between kilograms, grams, pounds, ounces, and other weight units instantly. Free, accurate, runs entirely in your browser.

Convert written-out English number words back into digits — supports both international and Indian (lakh/crore) numbering.

Check a URL's CDN, caching, compression, and baseline security headers in one pass. Free, fast, no signup.

Run a real Lighthouse audit for Core Web Vitals and a 0-100 performance score, plus CDN, cache, compression, and security-header results, all in one report. Free, fast, no signup.