Developer Tools

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.