Free Developer Tools Online
Format JSON, encode Base64, decode JWTs, test regex patterns, and generate hashes — essential developer utilities that run entirely in your browser. No API keys, no server-side processing.
- Validate and beautify JSON instantly
- Decode JWT headers and payloads
- Generate secure passwords and UUIDs
- Minify HTML and CSS for production
All Developer Tools (13)
JSON Formatter
Format, minify, and validate JSON data.
Base64 Encoder
Encode and decode text and files to Base64.
URL Encoder
Encode and decode URLs and URI components.
HTML Entity Encoder
Encode and decode HTML entities safely.
Regex Tester
Test regular expressions with live match highlighting.
JWT Decoder
Decode JWT tokens and inspect header and payload.
UUID Generator
Generate UUID v4 identifiers in bulk.
Password Generator
Generate secure random passwords with custom options.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, SHA-512, and MD5 hashes.
Cron Explainer
Explain cron expressions and show next run times.
CSS Minifier
Minify CSS to reduce file size.
HTML Minifier
Minify HTML by removing whitespace and comments.
Markdown to HTML
Convert Markdown to HTML with live preview.
Why use free developer tools online from Pinnacle Toolbox?
Every tool in our developer tools collection runs entirely in your browser. There is no software to install, no account to create, and no data uploaded to our servers. Whether you need a quick conversion or a daily workflow utility, our tools are free, fast, and private.
Browse all 13 tools above, or explore our full collection of 60+ free online utilities across text, images, code, math, and productivity.