Developer Tools
12 free tools · no sign-up
Browser-based utilities for developers: format JSON, test regex, encode and decode Base64 and URLs, decode JWTs, generate hashes, UUIDs and strong passwords, convert colors and generate SEO meta tags.
Because everything runs locally, you can safely paste tokens and snippets without them being logged on a server.
JSON FormatterFormat, validate and minify JSON.Base64 Encode/DecodeEncode text to Base64 or decode Base64 back to text.URL Encode/DecodeEncode or decode URL-safe text (percent-encoding).JWT DecoderDecode a JWT's header and payload. Does not verify the signature.Hash GeneratorGenerate SHA-1, SHA-256, SHA-384 or SHA-512 hashes of text.UUID GeneratorGenerate random UUIDs (v4), one or in bulk.Color ConverterConvert colors between HEX, RGB and HSL.Password GeneratorGenerate strong, random passwords with customizable length and character sets.Image to Base64Convert an image into a Base64 data URI for embedding in CSS or HTML.Regex TesterTest JavaScript regular expressions live with match highlighting, capture groups and flags.Meta Tag GeneratorGenerate SEO title, description, canonical, Open Graph and Twitter Card tags with a live search preview.Base64 to ImageDecode a Base64 string or data URI back into an image you can preview and download.
Frequently asked questions
Is it safe to paste tokens or keys?
Developer tools run entirely in your browser and never send input to a server. Still, avoid pasting live production secrets into any website.
Do these tools work offline?
After the page loads, the processing itself does not need a network connection.