Developer tools

Developer tools: 11 free tools. JSON Formatter, JSON Validator, Base64 Encoder / Decoder.

Each tool is free to use, with no account.

Format JSON with two or four spaces, validate its syntax, or minify it without changing the data.

Validate a JSON document and report syntax errors with location details when available.

Encode Unicode text as UTF-8 Base64 or decode a Base64 string back to text.

Encode a URL component or a complete URI and decode percent-encoded text.

Minify HTML using a syntax-aware parser while preserving significant text, preformatted content and inline code.

Parse and minify CSS while preserving string values, URLs and required spacing in expressions.

Minify modern JavaScript with Terser, preserving strings, regular expressions and language syntax.

Encode HTML-sensitive characters or decode named and numeric entities into literal text.

Convert Unix seconds or milliseconds to a date, and convert a local date back to a Unix timestamp.

Test JavaScript regular expressions with flags, match positions and highlighted results.

Search sixteen common HTTP status codes and learn what each response means.