Web & Encoding
Encode, hash, convert and compress — all in the browser.
Base64 EncoderEncode and decode Base64, including files and non-English text.URL EncoderPercent-encode and decode URLs, with a query-string breakdown.Hash GeneratorSHA-1, SHA-256, SHA-384 and SHA-512 checksums of text or files.Color ConverterHEX, RGB and HSL in step, with shades and a contrast checker.QR Code GeneratorTurn a link, message or Wi-Fi login into a QR code you can download.Image ResizerResize and compress images without uploading them anywhere.JSON FormatterPretty-print, minify and validate JSON, with errors pinpointed.Number Base ConverterConvert between binary, octal, decimal, hexadecimal and any base.UUID GeneratorGenerate v4 UUIDs and other random IDs from your browser's crypto RNG.Regex TesterTest a regular expression live, with every match and capture group shown.Timestamp ConverterConvert Unix timestamps to dates and back, in any time zone.
About these tools
Encode and decode Base64 and URLs, hash text or files, format JSON, generate QR codes and UUIDs, convert colours and number bases, and resize images — all without anything being uploaded.