Format minified JavaScript or compact it, with strings, templates and regex handled safely.
Check if a website is online and see its hosting, WordPress detection, SSL, DNS, SEO and performance.
Compare the execution speed of 2+ JS snippets, run in an isolated Web Worker.
Read any website's sitemap, see its page structure as a tree and graph, and check titles, meta tags and status codes.
Build an iOS/macOS Info.plist from common bundle/privacy keys.
Press a key to see its KeyboardEvent key/code/keyCode values live.
Preview a URL at common device viewport sizes.
Turn screenshots into polished images with device frames, gradients, shadows and text.
Build and explain cron expressions.
Decode and inspect JWT header/payload, verify signatures.
Generate harmonious color palettes.
Generate neumorphism CSS.
A browser stopwatch with lap times.
Show the IP address our server sees you connecting from.
Look up domain registration info.
Generate a scannable QR code.
Generate strong random passwords.
Generate passwords, API keys, AES keys, UUIDs, and RSA/SSH key pairs — all client-side.
Generate v4/v7 UUIDs in bulk.
Classic placeholder text for mockups.
Re-indent or minify CSS.
Convert a CSS length across px, rem, em, pt, and %.
Generate glassmorphism CSS.
Format and minify HTML markup.
Convert between Markdown and HTML.
Design CSS @keyframes animations.
Generate all standard favicon sizes.
Minify and clean up SVG markup.
Design and export CSS gradients.
Visually build an HTML table.
Design layered CSS box-shadows.
Diff two HTML snapshots.
Encode or decode HTML entities.
Generate head meta/Open Graph/Twitter Card tags.
Convert a font file between TTF/OTF and WOFF.
Visually build Tailwind class combos.
Check which web platform features your browser supports.
Show your screen/viewport size live.
Test every key of a new or old keyboard: on-screen layout, double-press detection, rollover test, heatmap and typing speed.
Follow a web address through every redirect and see status codes, loops and HTTPS upgrades.
Add a duration to a start time and see the resulting date/time.
Binary arithmetic plus a base converter.
Convert data sizes between bytes/KB/MB/GB/TB, decimal or binary.
Expand a CIDR block or address range into every individual IP address.
AND/OR/XOR/NOT/shift with a bit-level view.
Subnet math — network/broadcast address, netmask, host range.
Convert between seconds, HH:MM:SS, and human-readable durations.
Four common percentage calculations in one place.
Decode a MAC address's bit flags plus a best-effort vendor lookup.
Convert IPv4 to its integer/hex form and IPv4-mapped IPv6.
Convert CIDR, subnet and wildcard masks and generate Cisco ACL lines.
Convert MAC address formats, get the IPv6 link-local address and the Wake-on-LAN magic packet.
Generate random, locally-administered MAC addresses.
Generate an RFC 4193 Unique Local Address prefix for private IPv6 numbering.
Convert between Celsius, Fahrenheit, and Kelvin.
Find the holder, origin AS, announced prefix and BGP neighbours for an IP, prefix, AS number or hostname.
Generate random TCP/UDP port numbers for dev servers and configs.
Hex arithmetic/bitwise ops plus a base converter.
Searchable list of common TCP and UDP ports and the services that use them.
Calculate the TCP window you need and the real throughput given bandwidth, latency and packet loss.
Convert bps/Mbps/etc. and estimate download time.
Convert a time between zones with daylight saving handled, and find a meeting hour for everyone.
Summarize IPv4 and IPv6 routes into the smallest list of prefixes or one summary route.
Convert text to/from 8-bit binary bytes.
Percent-encode or decode text, component or full-URI mode.
Convert text to/from decimal character codes.
Automatically detect and decode Base64, hex, URL encoding, gzip and more, layer by layer.
Convert text to/from Unicode code points (U+XXXX).
Convert text to/from hex bytes.
Convert text to/from Base58 (Bitcoin alphabet).
Convert text to/from Base32 (RFC 4648).
Convert any file to a Base64 data URI, entirely in your browser.
Convert a URL query string to a JSON object and back.
Convert Base64 to a hex byte string and back.
Build hreflang alternate-language link tags.
Build a robots.txt from rule groups.
Build a sitemap.xml from a pasted URL list.
Build a canonical link tag.
Build JSON-LD structured data for common types.
Test a pattern against text with live match highlighting and capture groups.
Reshape a list — trim, dedupe, sort, wrap, and rejoin with any separator.
Strip empty/whitespace-only lines.
Evaluate a math expression with a real parser (no eval) — operators, functions, constants.
Live character, word, line, and sentence counts.
Plain-text line diff with added/removed highlighting.
Randomize the order of lines.
Searchable reference of regex tokens, quantifiers, and common patterns.
Render text as ASCII art by sampling a real rendered font, not a fixed glyph set.
Find/replace text with regex and whole-word options.
Normalize an email to its provider-canonical form for deduping.
Convert between UPPER/lower/Title/camelCase/snake_case/etc.
Convert text into a URL-safe slug.
Random common-English filler text.
Abbreviate words like "i18n" — first letter, middle count, last letter.
Sort lines alphabetically, A-Z or Z-A.
Remove repeated lines, keep the first occurrence.
Spell out text using the NATO phonetic alphabet.
Search and copy from a curated set of common emoji, grouped by category.
Convert between Arabic numbers and Roman numerals.
Parse a phone number into its E.164 calling code, country, and national number.
Build an AWS IAM policy JSON document.
Toggle Unix file permissions to build a chmod command.
Carve a VPC CIDR into equal subnets.
Build a Terraform variables file.
Look up AWS/GCP/Azure region codes.
Parse or build an AWS ARN.
Sample event payloads for S3/API Gateway/SNS/SQS/EventBridge.
Manage and diff .env files.
Re-indent Terraform configuration.
Convert a docker run command into an equivalent docker-compose.yml service block.
Generate a GitHub Actions workflow for Node, Python, PHP, Go, Java, Rust, .NET, Docker or Pages.
Parse/build S3 URLs (virtual-hosted, path-style, s3://).
Convert a .env file to JSON or YAML and back.
Monitor site/service uptime.
Convert between plain JSON and DynamoDB AttributeValue JSON.
Build an Apache .htaccess file for redirects, HTTPS, caching, compression and security, with Nginx rules.
Test which versions satisfy an npm-style semantic version range.
Generate nginx server blocks.
Generate a Dockerfile for common stacks.
Parse a User-Agent string.
Generate a docker-compose.yml.
Generate Kubernetes manifests.
Build sample APNs and FCM push payloads.
Validate a google-services.json against the expected Firebase config shape.
Build a .entitlements file (associated domains, app groups, push, iCloud, etc).
Generate all required app icon sizes.
Generate a mobile app privacy policy.
Manage translation strings across locales.
Analyze keyword competitiveness.
List files/sizes inside an APK.
Find high-value ASO keywords.
Generate App Store/Play Store metadata.
Generate app store release notes.
Encode or decode Base64 text and files.
Hash or verify text with bcrypt, using PHP's native password_hash/password_verify.
Generate MD5/SHA family hashes.
Generate a live TOTP (RFC 6238) code from a Base32 secret or otpauth:// URI.
Generate sortable, Crockford Base32-encoded ULIDs in bulk.
Test CORS behavior of an endpoint.
Look up a CVE ID or search by product: severity, CISA KEV status, exploit probability, affected products and references.
Generate secure random tokens/API keys.
Score vulnerabilities with CVSS 3.1: base, temporal and environmental scores and the vector string.
Read the version and creation time inside a UUID, and generate sortable UUID v7 values.
Validate an IBAN's mod-97 checksum and break it into country/BBAN.
Show the SHA256 and MD5 fingerprint, type and size of an SSH public key and compare it with another.
Compute an HMAC from a message and secret key (SHA-1/256/384/512).
Mask the middle of a string for redacting keys/emails in screenshots.
Encrypt/decrypt text with common ciphers.
Generate a BIP39 mnemonic seed phrase (12-24 words) with correct entropy and checksum.
Create the integrity attribute and HTML tag for scripts and stylesheets loaded from a CDN.
Check whether a password appears in known data breaches without sending it.
Build a Content-Security-Policy and find weaknesses in an existing one.
Pull IPs, domains, URLs, emails, hashes and CVEs out of text, and defang or refang links.
Score a password's strength and estimate crack time, entirely client-side.
Decode an X.509 certificate or CSR: subject, issuer, validity, SANs, key and fingerprints.
Create an RFC 9116 security.txt file so researchers know how to report vulnerabilities.
Find out which algorithm a hash came from, or checksum a file with MD5, SHA-1 and SHA-2.
Monitor SSL certificate expiry dates.
Fill in {{variable}} prompt templates and preview the resolved prompt.
Burst-test an endpoint to find its effective rate limit.
Searchable file extension <-> MIME type reference.
Searchable reference of every standard HTTP response status code.
Build and send HTTP requests, inspect responses, save history.
Build or decode an HTTP Authorization: Basic header.
Validate a chat completions request or function/tool schema shape.
Convert curl commands to fetch/Python/PHP/HTTPie and back.
Fetch a URL and explain its response headers, with a security-header grade.
Design REST endpoint specs and generate docs/mocks from them.
Walk through an OAuth2 Authorization Code flow and inspect tokens.
Compare two API responses and see a structured diff.
Run queries against any GraphQL endpoint and browse its schema.
Estimate LLM prompt token count.
Convert an OpenAPI/Swagger spec to a Postman Collection and back.
Get a unique inbox URL and inspect incoming webhook requests live.
Continuously monitor an endpoint for uptime/latency via cron.
WCAG text/background contrast ratio, AA/AAA pass-fail.
Convert between RGB and HSV/HSB, the model used by Photoshop/Figma color pickers.
Convert between hex codes and RGB values.
Convert between RGB and HSL.
Pick a color, see it in HEX/RGB/HSL.
Convert between CMYK (print) and RGB (screen) color values.
Generate random hex colors (pastel/vibrant/dark).
Browse Tailwind CSS's default color palette.
Convert between standard CSS named colors and hex codes.
Browse Google's Material Design color palette.
Build a .gitignore from checklists by language, editor, and OS.
Searchable reference of common git commands.
Visualize and help resolve merge conflicts.
Generate a conventional-commit message.
Find stale/merged branches to clean up.
Build shields.io badges for version, build, licence and downloads and copy them as Markdown or HTML.
Generate a changelog from commit history.
Generate release notes from merged PRs.
Diff two JSON documents.
Validate and format YAML documents.
Validate, pretty-print, and minify JSON.
Pretty-print and validate XML.
Convert JSON to XML, mirroring our XML to JSON Converter's conventions.
Convert between TOML and JSON/YAML.
Generate realistic sample JSON that follows a JSON Schema, with a repeatable seed.
Convert JSON to CSV with flattening, delimiters and Excel-friendly output.
Build a JSON Schema visually from sample data.
Generate TypeScript, Go, Java, C# or Python types from sample JSON.
Convert XML documents to JSON.
Re-indent Firestore security rules.
Validate and preview TOML as JSON.
Test JSONPath expressions against sample JSON.
Convert a Java .properties file to JSON or YAML and back.
Convert between CSV and JSON.
Convert a common YAML subset to JSON and back.
Convert CSV to a real .xlsx file and back.
Convert between Unix timestamps and dates.
Recover the original URL from a Microsoft Safe Links wrapped link.
Build a custom URI scheme deep link.
Build a cross-platform sms: link with a pre-filled message.
Build a Google Play Store link from a package name.
Break a URL down into protocol, host, path, query params, and hash.
Build an Apple App Store link from an app ID.
Build a mailto: link with subject/body/cc/bcc.
Build a wa.me click-to-chat link.
Follow redirects to the final destination.
Create short redirect links.
Generate test email addresses on RFC 2606 reserved domains.
Generate fake phone numbers (US 555 exchange, etc).
Generate fake names/emails/usernames for testing.
Generate Luhn-valid dummy card numbers for sandbox testing.
Generate fake street addresses for testing.
Shrink an image via adjustable JPEG/WebP quality.
Resize an image to exact dimensions.
Preview SVG markup safely (rendered as an image, not injected).
Drag-select and crop an image.
Convert an image to a base64 data URI and back.
Turn a code snippet into a styled PNG with themes, window frames and line numbers.
Convert an image between formats.
Rasterize SVG markup to PNG or JPEG at any size.
Generate a lightweight inline-SVG placeholder image, no network request.
Build MongoDB queries visually.
Convert CSV rows into INSERT statements.
Format and beautify SQL queries.
Analyze a query for potential performance issues.
Parse INSERT statements into a JSON array.
Visualize table relationships.
Diff two schema/query snapshots.
Generate an ER diagram from a schema.
Visualize an EXPLAIN plan.
Pretty-print a MongoDB query/document.
Pretty-print raw stack traces.
Summarize error rates/patterns in logs.
Parse and summarize crash reports.
Annotate screenshots to report bugs.
Search and tail uploaded log files.
Generate an EAN-13 barcode.