Developer tools
Format, validate, convert, and inspect the data you work with daily.
32 tools · all on your device
JSON Formatter
Paste compact or messy JSON and get it back neatly indented with your chosen spacing.
JSON Minifier
Remove all whitespace and line breaks from a JSON document to shrink it as small as possible.
JSON Validator
Check whether a JSON string is well-formed, and see the exact line and column of any syntax error.
JSON Beautifier
Reformat JSON with sorted keys and readable indentation for easier reading and diffing.
JSON Tree Viewer
Explore a JSON document as an interactive collapsible tree — expand and collapse any node.
XML Formatter
Pretty-print XML with configurable indentation, preserving attributes, comments, and tag order.
XML Validator
Check XML for well-formedness and report every error with its line and column number.
YAML Formatter
Normalize and re-indent YAML, or convert it to JSON, with a configurable indent width.
Markdown Preview
Render Markdown as formatted HTML with GFM tables and task lists, updating live as you write.
Markdown to HTML
Convert Markdown to sanitized HTML and download the result as an .html file, optionally wrapped in a full document.
HTML Formatter
Reindent and restructure HTML markup with consistent spacing and a clean tag hierarchy.
HTML Beautifier
Turn compressed or hand-written HTML into neatly indented, readable markup in one step.
HTML Minifier
Strip HTML comments and collapse whitespace between tags to shrink page markup size.
CSS Formatter
Reformat CSS rules with consistent indentation and one property per line for easy reading.
CSS Beautifier
Expand minified or tangled CSS into clearly indented, human-readable style declarations.
CSS Minifier
Remove CSS comments, collapse whitespace, and drop redundant semicolons to slim your stylesheet.
JavaScript Formatter
Reformat JavaScript with consistent indentation, spacing, and brace placement.
JavaScript Beautifier
Turn compressed or hand-written JavaScript into readable code with consistent indentation.
JavaScript Minifier
Compress JavaScript with dead-code removal and variable renaming to reduce bundle size.
JWT Decoder
Decode a JSON Web Token and inspect its header, payload, and claim timestamps without verifying the signature.
URL Parser
Break a URL into its protocol, host, port, path, query parameters, and fragment in a clear table.
Query String Parser
Parse a URL query string into key-value pairs, handling repeated keys and percent-encoding.
Timestamp Converter
Convert any Unix timestamp or ISO date into multiple formats: seconds, milliseconds, UTC, local, and relative.
Unix Timestamp Converter
Get the current Unix time at a glance and convert any timestamp between seconds, milliseconds, ISO, and local forms.
Hash Generator
Compute MD5, SHA-1, SHA-256, SHA-384, or SHA-512 checksums of any text, entirely in your browser.
Regex Tester
Test a regular expression against input text and see every match with its index and capture groups.
Hex to RGB Converter
Paste a hex color code and instantly see the matching RGB and HSL values with a live preview swatch.
RGB to Hex Converter
Turn an rgb() or rgba() color value into its hex equivalent and see hsl() alongside a color swatch.
HSL Color Converter
Enter any color in hex, rgb(), or hsl() notation and get all three formats at once with a swatch.
CSV to JSON
Convert a CSV file into a JSON array, with delimiter auto-detection and a header row toggle.
JSON to CSV
Paste a JSON array of objects and get a CSV file ready to open in any spreadsheet app.