Developer Tools
JSON, hashes, encoders, JWT, and the everyday developer utilities.
26 tools
CSS Box Shadow GeneratorDrag sliders to build a CSS box-shadow with a live preview.CSV to JSON ConverterConvert CSV to a JSON array — first row as keys, numbers typed.Flexbox GeneratorSet flex properties from dropdowns and watch the layout update live.Hex to RGB ConverterConvert a hex color to RGB and back, with a live swatch preview.HTTP Status CodesEvery common HTTP status code, with what it means — searchable, in your browser.JSON FormatterPretty-print, minify, and validate JSON — with the exact error location.JSON to CSV ConverterTurn a JSON array of objects into clean CSV — header and all.Markdown Table GeneratorFill a grid, get a clean aligned markdown table to paste.PX to REM ConverterConvert px to rem and back at any root font size, with a table.SQL FormatterPretty-print SQL with clause breaks and uppercased keywords.Subnet CalculatorWork out the network address, broadcast, host range and host count for any IPv4 CIDR block.ASCII TablePrintable ASCII characters with their decimal and hex codes — searchable.Download Time CalculatorEstimate how long a file takes to download at a given connection speed.Hash GeneratorHash any text with SHA-1, SHA-256, SHA-384, and SHA-512 at once.IP Address ConverterConvert an IPv4 address between dotted-decimal, 32-bit integer, binary and hexadecimal.JWT DecoderDecode a JSON Web Token's header and payload — locally, never verified online.MIME TypesLook up the MIME type for any file extension — and the other way around.XML FormatterPretty-print, minify, and validate XML in the browser.Regex TesterTest a regular expression live — matches highlighted, groups listed.Unix Timestamp ConverterConvert Unix epoch time to a human date and back, both directions.Cubic Bezier GeneratorDrag the curve or pick a preset to craft a cubic-bezier() easing.HTML Entity Encoder / DecoderEscape text into HTML entities or decode entities back to characters.NATO Phonetic AlphabetAlfa, Bravo, Charlie — the full NATO spelling alphabet for A–Z and 0–9.Number Base ConverterConvert between decimal, binary, octal, and hex — all four update live.URL Encoder / DecoderPercent-encode text for URLs or decode it back — instantly.YAML to JSON ConverterConvert YAML to JSON and back, both directions, in-browser.