All tools

Convert text to and from Base64, with URL-safe output and full UTF-8 support for Chinese and emoji. Runs entirely in your browser.

Percent-encode and decode, with separate modes for a parameter value and a whole URL, plus a breakdown that decodes each query parameter.

Generate UUID v4 (random) and v7 (time-sortable) in bulk, with uppercase and hyphen-free options, using the browser's cryptographic randomness.

Decode a JWT's header and payload, with expiry times rendered as readable dates. Decoding only — the token never leaves your browser and is never stored.

Compute SHA-1, SHA-256, SHA-384 and SHA-512 with Web Crypto, in hex or Base64, optionally all at once.

Test regular expressions live: every match position, captured groups and a replacement preview, with support for the g, i and m flags.

Compare two texts line by line with +/- output, optionally ignoring whitespace and case, showing everything or just three lines of context.

Beautify or minify SQL for PostgreSQL, MySQL, SQLite, SQL Server, BigQuery and more, with consistent keyword case.

Build a five-field cron expression from presets or fields, with a plain-language description of when it actually runs. Works with crontab and Vercel Cron.

Derive TypeScript interfaces or types from a JSON sample, including nested objects and arrays, with named sub-types instead of one giant inline shape.