FW Smile DevToolsBox is a free collection of 21+ online utilities built for web developers, designers, and anyone who works with code, text, images, and data on a daily basis. Our goal is simple: bundle the small, repetitive tasks you do all day into one fast, clean, ad-supported toolbox so you never have to hunt across a dozen sketchy websites again.

Every tool runs entirely in your browser. When you compress an image, format a JSON file, generate a hash, or decode a token, the work happens locally on your own device using JavaScript and the Canvas API. Your files and text are never uploaded to a server, which keeps your data private and the tools instant — even for large files and offline use.

Why we built it

Most online developer tools are buried in pop-ups, redirect you to download apps, or quietly send your data to a backend. We wanted a single, trustworthy home for the everyday essentials — no sign-up, no installs, no tracking of the content you process. Just open a tab and get the job done.

What you'll find

Our tools are organized into a few practical categories:

• Image Tools: Image Cropper, Image Compressor, Logo Normalizer, Image Placeholder, QR Code Generator.
• Text & Data: JSON Viewer, Diff Checker, Lorem Ipsum Generator, Markdown Preview.
• Encoding: URL Encode / Decode, Base64 Encode / Decode, HTML Entity Encode / Decode, Basic Auth Encode / Decode, JWT Decoder.
• Web Dev: CSS Unit Converter, Color Converter, Regex Tester, SEO Checklist.
• Utility: Password Generator, Timezone Converter, Hash Generator.

How it stays free

FW Smile DevToolsBox is free to use and supported by non-intrusive advertising and optional community donations. Ads help cover hosting and ongoing development so we can keep every tool free for everyone. If a tool saves you time, you can buy us a coffee to support the project.

Get in touch

We're always improving. If you have a feature request, found a bug, or want to suggest a new tool, head to our Contact page. You can also review how we handle data in our Privacy Policy and the rules of use in our Terms of Use.