Tools that just work

Base64 Encode & Decode Encode and decode Base64 online: text (UTF-8), URL-safe Base64, files and data URIs. Free and private — it runs in your browser. URL Encode & Decode Percent-encode and decode URLs and query strings online: encodeURIComponent, encodeURI and form encoding (+ for spaces). Private, in your browser. HTML Entities Encode & Decode Encode and decode HTML entities online: named (é), decimal and hex references. Escape only unsafe characters or every non-ASCII one. JWT Decoder & Verifier Decode a JSON Web Token and verify its HS, RS, PS or ES signature in your browser. Shows exp, iat and nbf as dates. The token never leaves your device. Hex, Binary & Decimal Converter Convert text to hex, binary or decimal bytes and back, with a UTF-8 byte view and hex dump. Handles emoji and accents. Private, in your browser. Punycode Converter Convert internationalized domain names to Punycode (xn--) and back, label by label. Free, private, no uploads. Unicode Inspector Inspect every character of a text: code point, category, UTF-8 and UTF-16 bytes. Spots zero-width characters, bidi controls, odd spaces and look-alikes. String Escape & Unescape Escape and unescape strings for JSON, JavaScript, PHP (single and double quotes), SQL, MySQL, CSV and regular expressions. Private, in your browser.

JSON Formatter & Validator Format, minify and validate JSON online. Pretty-print with 2 spaces, 4 spaces or tabs, sort keys, see the exact line and column of an error, browse a tree. Private. JSON ⇄ YAML Converter Convert JSON to YAML and YAML to JSON online, in both directions. Handles multi-document YAML and loads YAML safely (no custom tags). Private, in your browser. JSON ⇄ CSV Converter Convert JSON to CSV and CSV to JSON online. Choose the delimiter, flatten nested objects with dot keys, and export spreadsheet-safe CSV. Private, in your browser. XML Formatter & Validator Format, minify and validate XML online. Choose the indentation, find errors with line and column. Never loads external entities. Private. SQL Formatter Format and beautify SQL queries online for MySQL, PostgreSQL, SQLite and T-SQL. Choose keyword case and indentation. Private, in your browser. JSON to TypeScript, PHP & Go Types Generate TypeScript interfaces, PHP 8 readonly classes or Go structs from a JSON sample. Merges arrays, marks optional and nullable fields. Private, in your browser. Text Diff Checker Compare two texts line by line, side by side or inline. Ignore whitespace and case, or compare JSON ignoring formatting and key order. Private, in your browser. Markdown Preview Write Markdown and see the rendered result live, with GitHub-flavored tables, task lists and code blocks. Output is sanitized, and nothing leaves your browser.

Password Generator Generate strong random passwords in your browser: 1 to 500 at once, any length, custom symbols, no ambiguous characters. Nothing is sent or stored. Passphrase Generator Generate memorable random passphrases from the EFF large wordlist (7,776 words) in your browser. Choose words, separator and see the entropy. Nothing leaves your device. Secret & API Key Generator Generate random hex, base64 or base64url secrets, a Laravel APP_KEY, prefixed API keys and a ready .env block in your browser. Nothing is sent or stored. UUID, ULID & NanoID Generator Generate UUID v4, UUID v7 (time-ordered), ULID and NanoID in bulk, and decode the timestamp inside a UUID v1/v6/v7 or ULID. Runs in your browser. SSH Key Generator Generate an Ed25519 or RSA (2048, 3072, 4096) SSH key pair in your browser: OpenSSH public and private key, PKCS#8 PEM and SHA256 fingerprint. QR Code Generator & Reader Create QR codes for text, links, Wi-Fi, contacts (vCard) and e-mail, download them as PNG or SVG, and read a QR code from an image or your camera. Runs in your browser. Lorem Ipsum Generator Generate lorem ipsum placeholder text as paragraphs, sentences or words, plain or wrapped in HTML paragraph tags. Free, in your browser. Fake Data Generator Generate fake test data: names, example.com e-mails, addresses, phones, IBANs with a valid checksum, test card numbers and UUIDs. Export CSV or JSON. In your browser.

Unix Timestamp Converter Convert Unix timestamps (seconds, milliseconds, microseconds) to dates and back: ISO 8601, RFC 2822, relative time and any time zone. Live clock. In your browser. Number Base Converter Convert numbers between binary, octal, decimal, hexadecimal and base 36 with unlimited size (BigInt), and see the two’s complement for 8, 16, 32 and 64 bits. Unit Converter for Developers Convert px to rem and em with your base font size, bytes between SI (kB, MB) and IEC (KiB, MiB) units, and milliseconds to a readable duration and back.

Color Converter Convert colors between HEX, RGB, HSL, HWB and OKLCH, pick one visually and check the WCAG 2 contrast ratio (AA and AAA) of a text and background pair. chmod Calculator Tick Unix file permissions and get the chmod octal (755), the symbolic form (rwxr-xr-x) and the command, with setuid, setgid, sticky bit and umask support. Cron Expression Explainer Paste a cron expression and read what it means in plain English or Spanish, see its next 10 run times in any time zone, and get the Laravel schedule method. Regex Tester Test JavaScript regular expressions live: flags, highlighted matches, capture and named groups and a replace preview. Runs in a worker with a timeout. Case Converter Convert text to camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, Title Case, Sentence case or a URL slug with accents removed. Character & Word Counter Count characters (emoji-aware), words, sentences, lines and paragraphs, see the size in UTF-8 and UTF-16 bytes and get the reading and speaking time of any text. URL Parser Split a URL into scheme, credentials, host, port, path, query parameters and fragment, edit any part or parameter, and copy the rebuilt URL. Runs in your browser. User Agent Parser Parse any user-agent string into browser, engine, operating system, device and CPU, see your own user agent and the UA Client Hints your browser exposes. CIDR / Subnet Calculator Calculate network, broadcast, first and last host, host count, netmask and wildcard for IPv4 and IPv6 CIDR blocks, split them into subnets and check if an IP is in range. Semver Tool Compare two semantic versions, test a version against an npm or Composer range (^, ~, >=, ||) and sort a list of versions the way semver orders them.

HTTP Status Codes Every HTTP status code from 100 to 511 with its name, what it means and when to use it (200, 201, 301, 404, 429, 502...). Searchable and free. MIME Types Lookup Find the MIME type (Content-Type) for any file extension, or the extensions of a MIME type. Common types and the full IANA-based list, searchable and free. CSP Builder Build a Content-Security-Policy header with checkboxes, or paste a policy to find unsafe-inline, wildcards and missing object-src or base-uri. Runs in your browser. .gitignore Generator Generate a .gitignore by combining templates for Laravel, Node, Python, Java, Go, macOS, Windows, JetBrains and VS Code. Free, runs in your browser.

Image Metadata Viewer See the hidden data in a photo: camera, lens, date, GPS location, XMP, IPTC and ICC profile. The image is read in your browser and never uploaded. EXIF Remover Remove EXIF, GPS location, XMP and IPTC metadata from JPEG, PNG and WebP photos. Lossless for JPEG and PNG, batch download as ZIP. Nothing is uploaded. Image Converter Convert, resize and compress images in your browser: JPEG, PNG, WebP and AVIF, with a quality slider, before/after size and batch ZIP download. Nothing is uploaded. Favicon Generator Make a full favicon package from a PNG or SVG: favicon.ico (16, 32, 48), PNG sizes, Apple touch icon, PWA icons, site.webmanifest and the HTML snippet, as a ZIP. Image to Base64 Convert an image to a Base64 data URI, an HTML <img> tag, a CSS background-image or Markdown. Warns when the result is too large. Runs in your browser.

Password Strength Checker Check how strong a password is in your browser: pattern-aware score, estimated crack times and tips. Optional breach check sends only 5 characters of a hash. Hash Generator Calculate MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA-3, CRC32 and xxHash of text or a file in your browser. Large files are streamed. Compare against a checksum. HMAC Generator & Verifier Compute and verify HMAC-SHA-1, SHA-256, SHA-384 and SHA-512 in your browser with the Web Crypto API. Hex, base64 or base64url output. Your key never leaves the page. Bcrypt & Argon2 Hash Generator Hash passwords with bcrypt (cost 4–14) or Argon2id and verify a password against a hash, in your browser. Compatible with PHP password_hash(). Nothing is uploaded.