Developer Tools
JSON, Base64, regex and more — 16 free tools, no sign-up.
Android App BuilderBuild and export a real signed APK (testing) and AAB (Google Play) from HTML, CSS and JavaScript — all in your browser.
Image to 3DTurn any photo into a rotatable 3D model with AI depth. Export GLB, OBJ, STL.
Video to 3DTurn a video into an interactive 3D depth video with AI.💻Code StudioWrite code in any language, preview HTML/CSS/JS live, build multi-file projects and download a ZIP. Sign-in required.
JSON FormatterFormat, minify and validate JSON.
Base64 Encoder / DecoderEncode text to Base64 or decode it back — Unicode safe.
URL Encoder / DecoderEncode or decode links and query strings.
Regex TesterTest regular expressions with live highlighting.
Hash GeneratorSHA-1, SHA-256 and SHA-512 hashes of your text.
UUID GeneratorGenerate random version-4 UUIDs in bulk.
CSS Gradient GeneratorDesign a gradient and copy the CSS.
Color PickerPick colors and copy HEX, RGB or HSL.
HEX to RGB ConverterConvert a HEX color to RGB and HSL.
RGB to HEX ConverterConvert RGB values to a HEX color code.
JWT DecoderDecode a JSON Web Token header and payload.
CSS Box Shadow GeneratorDesign a box shadow and copy the CSS.About our developer tools
Handy utilities for developers: JSON, Base64, regex, hashes, colors and more. Every tool is free, private and works on phones, tablets and computers.
Looking for something else? Try PDF Tools, Image Tools, Video & Audio, Text Tools, Calculators, Converters, Everyday Tools.
Frequently Asked Questions about developer tools
Quick answers before you start.
What free developer tools does Supreme Pro offer?
Supreme Pro has 13 free developer tools, including Code Studio, JSON Formatter and Base64 Encoder / Decoder. Each one opens on its own page, so you can start straight away without installing anything.
Do I need to sign up to use these developer tools?
No. The developer tools work without an account or sign-up. Open a tool, add your input and download or copy the result.
Are my files and data uploaded to your servers?
Most tools run inside your browser, so what you add stays on your own device. Each tool page explains how it works, and our privacy policy has the details.
Do the developer tools work on phones and tablets?
Yes. They are built for current versions of Chrome, Edge, Firefox and Safari on Android, iOS, Windows and macOS. Very large files can be slow on older phones.
How do I find the right tool quickly?
Use the filter box at the top of this page, the search button in the header, or the menus at the top of every page. Related tools are also listed at the bottom of each tool page.
Is there a limit on how often I can use them?
We do not limit how many times you use a tool. Because the work happens in your browser, the practical limit is your device's memory, so try a smaller file if a page slows down.
Is it safe to paste code or tokens into the developer tools?
They run in your browser and do not send what you paste to our servers. Even so, avoid pasting live passwords, API keys or customer data into any online tool when you can use test values.
Why people choose Supreme Pro
