JWT Decoder
Decode and inspect JSON Web Tokens instantly. View headers, payload, and expiration without sending data anywhere.
Secure & Private
All decoding happens in your browser. No data is sent to any server.
Real-time Validation
Instant feedback on token structure and validity as you type.
Developer Friendly
Clean interface with copy buttons and formatted JSON output.
Related Tools
JSON Formatter
Format, validate, and minify JSON data instantly with syntax highlighting.
Base64 Encoder
Encode and decode strings or files using Base64 encoding.
Unix Timestamp
Convert Unix timestamps to human-readable dates and back instantly.
URL Encoder
Encode and decode URLs with percent-encoding instantly.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly.
JSON ↔ YAML
Convert between JSON and YAML instantly with real-time validation.
Regex Tester
Test and debug regular expressions with live match highlighting.
UUID Generator
Generate UUID v4 values instantly, with bulk generation and validation.
JWT Generator
Build and sign JSON Web Tokens with a custom payload and secret.
Text Diff
Compare two blocks of text and highlight additions, deletions, and unchanged lines.
Case Converter
Convert text to camelCase, snake_case, UPPERCASE, kebab-case, and more.
Cron Parser
Parse cron expressions into plain English and see the next scheduled run times.
SQL Formatter
Format and minify SQL queries with dialect support for MySQL, PostgreSQL, SQLite, and more.
CSV ↔ JSON
Convert CSV to JSON or JSON to CSV with support for custom delimiters and quoted fields.
What is a JWT? JSON Web Tokens are an open, industry standard RFC 7519 method for representing claims securely between two parties.
This tool decodes the token structure but does not verify the signature. Always validate tokens server-side.