Are these developer tools free?

Yes — every developer tool here is completely free, with no signup, no usage limits, and no ads injected into your data.

Completely. Everything runs locally in your browser — your JSON, tokens, and text are never uploaded to any server.

Do the tools work offline?

Once the page has loaded, the tools run fully client-side and keep working without a network connection.

Free Online Developer Tools

Format and validate JSON, encode Base64, decode JWTs, and generate hashes — fast, client-side developer utilities that run entirely in your browser.

4 free online tools — 100% private

JSON Formatter

Format, validate, and minify JSON

Base64 Encoder / Decoder

Encode and decode Base64

JWT Decoder

Decode JWT header and payload

Hash Generator

Generate SHA-1, SHA-256, SHA-512 hashes

How It Works

Select Your File

Choose or drag & drop your file into the tool. No signup or login required.

Process Instantly

Your file is processed entirely in your browser. Nothing is uploaded to any server.

Download Result

Download your processed file immediately. It's that simple.

100% Private Processing

Unlike other online tools, your files never leave your device. All processing happens locally in your browser using modern web technologies. No upload, no server, no data collection.

No file upload

No server processing

No tracking or analytics on files

No file size limits

Free forever

Works offline once loaded

Frequently Asked Questions

Need a custom tool?

We can build tailored solutions for your specific needs.