JSON, Base64, hashes, regex, JWT and timestamps — the daily drivers.
Format, validate and minify JSON with precise, human-readable error messages.
Encode and decode Base64 text — Unicode-safe — plus file to Base64 and back.
SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text or file.
Test regular expressions live, with highlighted matches and capture groups.
Decode a JSON Web Token’s header and payload, with expiry shown in plain English.
Generate one or hundreds of random v4 UUIDs, ready to copy.
Convert Unix timestamps to human dates and back — seconds or milliseconds, local and UTC.
Convert JSON arrays to CSV and back, with proper quoting and nested-field flattening.