Code and Data Helpers100% Free24 tools

Free Developer Tools for Everyday Coding Jobs

Encode and decode, generate CSS, turn data into code, compare versions, and check bits and checksums. Every tool runs in your browser, so your code and data stay private.

Encoders

Base32 Encoder and DecoderEncode text to Base32 or decode Base32 to text. Base58 Encoder and DecoderEncode text or hex to Base58 and decode it back. String Escape and Unescape ToolEscape or unescape text for JSON, JS, HTML, regex, SQL and CSV.

CSS

CSS Box Shadow GeneratorWrite box-shadow CSS from offset, blur, spread and color. CSS Border Radius GeneratorWrite border-radius CSS for each corner, with presets. CSS Text Shadow GeneratorWrite text-shadow CSS with presets for glow and outline. CSS Clamp CalculatorMake fluid clamp() values for responsive font sizes. PX to REM and EM ConverterConvert px, rem, em, pt and percent with your own base size. Aspect Ratio CalculatorFind an aspect ratio, or resize to a new width or height.

Data helpers

SQL IN Clause GeneratorTurn a pasted list into a quoted SQL IN (...) list. JSON to TypeScript ConverterGenerate TypeScript interfaces from a JSON sample. Query String ParserDecode URL parameters into a table and JSON. Markdown Table GeneratorTurn CSV or spreadsheet data into a Markdown table.

Developer tools

Semantic Version ComparatorCompare two semantic versions by the official rules. Bitwise CalculatorBitwise AND, OR, XOR, NOT and shifts with a bit view. IEEE 754 Floating Point ConverterConvert numbers to float32 or float64 bits and back. CRC32 and Checksum CalculatorCRC32, CRC16 and Adler-32 of text or hex bytes. ASCII Table and Character LookupLook up ASCII codes by character, number or name.

Developer helpers

DPI and PPI CalculatorScreen PPI, print size from pixels, and pixels for a print. Megapixel CalculatorPixels to megapixels, megapixels to pixels, and print sizes. CSV SorterSort CSV rows by a column, as text or numbers. CSV ValidatorCheck a CSV for column, quote and header errors. package.json Validator and SorterValidate and sort a package.json file. .npmrc ValidatorCheck .npmrc lines, secrets, registries and settings.

How These Developer Tools Work

Every tool on this site runs in your browser with JavaScript. What you paste is processed on your own device. It is not uploaded, stored or logged, and no outside service is used, which makes the tools safe for private code and data.

Which Tool Should I Use?

Encoders: Base32, Base58, the string escape tool and the ASCII table.
CSS: the box shadow, border radius and text shadow generators, the clamp calculator, the px to rem converter and the aspect ratio calculator.
Data helpers: the SQL IN generator, JSON to TypeScript, the query string parser and the Markdown table generator.
Low level: the bitwise calculator, the IEEE 754 converter, the checksum calculator and the semver comparator.

More free tools: text tools, website tools, color tools and math calculators. For web standards, see MDN Web Docs.