The developer toolbox that respects your data
Format JSON, generate QR codes and barcodes, compress images, convert units and more. Fast, beautiful and private — nothing ever leaves your browser.
Private
Runs locally, no uploads
Instant
No sign-up, no waiting
Free
Every tool, forever
JSON Formatter & Converter
Format, validate, minify and convert JSON to YAML, CSV or TypeScript.
DataQR Code Generator
Create QR codes with custom colors and size. Download PNG or SVG.
GeneratorsBarcode Generator
CODE128, EAN-13, UPC, CODE39, ITF and more. PNG & SVG export.
GeneratorsImage Compressor
Batch compress images to WebP, JPEG or PNG with a quality slider.
MediaUnit Converter
Length, weight, temperature, data size, time, speed, area and more.
ConvertersVariable Name & Case Converter
camelCase, snake_case, PascalCase, kebab-case, CONSTANT_CASE…
TextBase64 Encode / Decode
Encode and decode Base64 text or files, UTF-8 safe.
EncodingURL Encode / Decode
Percent-encode and decode URLs and query strings.
EncodingUUID / ULID Generator
Generate UUID v4, v7 and ULIDs in bulk.
GeneratorsHash Generator
MD5, SHA-1, SHA-256, SHA-384, SHA-512 for text and files.
SecurityJWT Decoder
Decode JSON Web Tokens and inspect header, payload and expiry.
SecurityUnix Timestamp Converter
Convert epoch seconds/milliseconds to dates and back.
ConvertersRegex Tester
Test regular expressions with live match highlighting.
TextColor Converter & Picker
HEX, RGB, HSL, OKLCH conversion with a visual picker.
ConvertersText Diff Checker
Compare two texts and highlight differences line by line.
TextPassword Generator
Strong random passwords using the Web Crypto API.
SecurityMarkdown Preview
Write Markdown and see a live rendered preview.
TextCron Expression Parser
Explain cron expressions in plain language with next run times.
ConvertersLorem Ipsum Generator
Placeholder paragraphs, sentences or words.
GeneratorsNumber Base Converter
Binary, octal, decimal and hex conversion (BigInt).
Converters