19 developer tools that run entirely in your browser. No account, no upload, nothing sent to a server.
Format, validate, and inspect JSON directly in your browser.
Format and inspect XML documents.
Encode and decode Base64 strings directly in your browser.
Encode, decode, and break apart URLs and their query strings.
Encode and decode HTML entities.
Convert text to and from Unicode escape sequences.
Test regular expressions with live match highlighting and capture groups.
Compare two blocks of text line by line, with the changed words highlighted.
Generate UUID values locally.
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 digests at once.
Decode JWT headers, payloads, and expiry claims locally.
Generate secure passwords and see the entropy behind them.
Generate and verify HMAC signatures for text payloads.
Convert Unix timestamps and readable dates.
Calculate the difference between two dates.
Inspect cron schedules in readable form.
Convert between hex, RGB, HSL, and CSS color names, with contrast checks.
Convert between units of length, weight, temperature, area, volume, and speed.
Convert between CSV and JSON directly in your browser.