Free tools
Practical utilities for everyday builders.
Small, focused tools that run in your browser — pick one and get to work.
18 of 18 tools
JSON FormatterLiveFormat, validate, repair, and convert JSON live — tree view, path filter, YAML/CSV/TypeScript.OpenCSV ⇄ ExcelLiveConvert CSV to Excel or Excel back to CSV in the browser, with delimiter detection.OpenQR Code GeneratorLiveCreate stylish QR codes for links, Wi-Fi, contacts, and text — PNG or SVG.OpenEMI CalculatorLiveEstimate monthly EMI, interest, and repayment schedules for home, car, or personal loans.OpenBasic CalculatorLiveEveryday arithmetic with memory keys, keyboard input, and browser history.OpenImage CompressorLiveCompress JPG, PNG, and WebP, resize, convert formats, and download lighter files.OpenUUID GeneratorLiveGenerate UUID v4, Nano IDs, and custom random strings in bulk for tests and APIs.OpenURL Encoder & DecoderLiveEncode or decode percent-encoded text and inspect or rebuild query strings.OpenJWT DecoderLiveDecode JWT headers and payloads, inspect claims, and check expiration locally.OpenBase64 EncoderLiveEncode text to Base64 or decode Base64 strings, including small file data URLs.OpenTimestamp ConverterLiveConvert Unix timestamps to readable dates and dates back to epoch seconds or ms.OpenRegex TesterLiveTest regular expressions with live match highlighting, flags, and capture groups.OpenWord CounterLiveCount words, characters, sentences, paragraphs, and estimated reading time.OpenPassword GeneratorLiveGenerate strong random passwords with length and character options, locally.OpenCode FormatterLiveBeautify or minify HTML, CSS, and JavaScript for development and debugging.OpenColor ConverterLiveConvert HEX, RGB, and HSL; generate palettes and copy CSS-ready colour codes.OpenPDF ToolsLiveMerge, split, rotate, and rewrite PDFs in the browser without uploading files.OpenCSV to JSONLiveConvert CSV tables to JSON arrays and JSON arrays back to CSV with previews.Open
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