JSON formatter, Base64, regex tester, URL encoder, and more.
Developer Tools
Format, beautify, and minify JSON instantly with validation and error positions.
Validate JSON and pinpoint syntax errors with exact line and column numbers.
Encode and decode Base64 strings with UTF-8, Unicode, and emoji support.
Percent-encode or decode URLs, query strings, and path segments with full UTF-8 and emoji support.
Test regular expressions live with match highlighting, capture groups, and flag support.
Encode text to HTML entities or decode them back, with full named, numeric, and hex entity support.
Generate MD5, SHA-1, SHA-224, SHA-256, SHA-384, or SHA-512 hashes from any text instantly.
Generate version 1 (time-based) or version 4 (random) UUIDs instantly.
Convert Unix timestamps to human-readable dates and back, in seconds or milliseconds.
Explain a cron expression in plain English and preview its next 10 run times.
Look up any HTTP status code for its meaning, RFC, typical causes, and common fixes.
Look up any HTTP request or response header for its meaning, RFC, usage, and security notes.
Look up any DNS record type for its purpose, RFC, typical usage, and security notes.
Developer Tools · Security
Generate an unsigned JWT from header and payload JSON for development and testing.
Build a ready-to-copy curl command from a method, URL, headers, body, and auth.
Convert an endpoint definition into a ready-to-use curl, Fetch, Requests, or HTTPX snippet.
Beautify SQL indentation, normalize keywords, and catch obvious syntax issues.
Normalize YAML indentation and catch common mistakes like duplicate keys and mixed tabs.
Normalize XML indentation and catch common mistakes like unclosed or mismatched tags.
Convert a limited, safe Markdown subset into normalized formatting and an HTML preview.
Decode JWT header, payload, and claims with expiry status. Decoding only — no signature verification.