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Free online tools for images, colours and code

Convert images, pick exact hex colours and check contrast, format JSON and minify your code. Everything runs in your browser, so nothing you paste or drop is ever uploaded.

Convert an imageBrowse all tools

No sign-up · No upload · No watermark

Why use ToolForge

Nothing is uploaded

Every tool decodes, converts and formats locally. There is no upload endpoint, so your images and data cannot be intercepted or stored.

Instant, with no queue

Processing starts the moment you drop a file. No upload progress bar, no server round trip, no waiting for someone else's batch to finish.

Built by people who use them

The tools exist because the job came up and the alternatives either uploaded private data or produced wrong results.

Popular tools

The most used tools on ToolForge.

All tools

Image Converter

Convert images between formats with drag and drop. Nothing is uploaded.

Colour Picker & Palette Generator

Eyedrop any colour, get its hex code, and prove the palette is readable.

CSS Previewer & Design Playground

Paste CSS and watch it render. Build gradients and shadows by dragging.

JSON Formatter & Validator

Format, minify and validate JSON with exact line and column errors.

Image Tools

1 tool

Convert, compress and resize images in your browser.

Image Converter

Image Tools

Convert images between formats with drag and drop. Nothing is uploaded.

Colour & Design Tools

2 tools

Pick colours, build palettes and check accessibility.

Colour Picker & Palette Generator

Colour & Design Tools

Eyedrop any colour, get its hex code, and prove the palette is readable.

CSS Previewer & Design Playground

Colour & Design Tools

Paste CSS and watch it render. Build gradients and shadows by dragging.

Developer Tools

13 tools

Format, encode, convert and generate - all client-side.

JSON Formatter & Validator

Developer Tools

Format, minify and validate JSON with exact line and column errors.

Base64 Encoder & Decoder

Developer Tools

Encode and decode Base64 for text and files, with correct UTF-8 handling.

URL Encoder & Decoder

Developer Tools

Percent-encode, decode, build query strings and dissect any URL.

JSON to CSV Converter

Developer Tools

Convert JSON to CSV and back, flattening nested data with dot notation.

UUID Generator

Developer Tools

Generate cryptographically secure UUID v4 or time-ordered v7 in bulk.

QR Code Generator

Developer Tools

Create custom QR codes as PNG or SVG, with logo, colours and error correction.

Unix Timestamp Converter

Developer Tools

Convert Unix timestamps to readable dates and back, in UTC and your local time.

HTML Minifier

Developer Tools

Strip HTML comments and whitespace and see the byte savings instantly.

CSS Minifier

Developer Tools

Strip CSS comments and whitespace, and shorten colours and units safely.

JavaScript Minifier

Developer Tools

Mangle names and compress JavaScript with terser, entirely in your browser.

Regex Tester

Developer Tools

Test regular expressions with match highlighting, group breakdown and flags.

HTML & CSS Snippet Generator

Developer Tools

Build clean HTML and CSS boilerplate from a form and copy it straight into your project.

JWT Decoder & Inspector

Developer Tools

Inspect JWT headers, claims and expiry locally. The token never leaves your device.

About ToolForge

Are my files uploaded anywhere?

No. Every tool on ToolForge runs entirely inside your browser using JavaScript, the Canvas API and WebAssembly. Your images, JSON, tokens and text are processed on your own device and never sent to our servers. That is also why there is no file size limit and why the tools keep working on a slow or intermittent connection.

Is ToolForge really free?

Yes, and there is no account to create, no trial to expire and no watermark added to your output. The site is funded by advertising, which is why you will see ad slots around the tools. We never put an ad inside a tool interface or over the controls you are using.

Do the tools work offline?

Once the page has loaded, yes. Because the processing is client-side, you can load a tool, switch to offline mode and it will keep working. Nothing is streamed from a server while you use it.

Which formats does the image converter support?

Output can be PNG, JPEG, WebP, AVIF, BMP or ICO. Input covers anything your browser can decode, which in practice means PNG, JPEG, GIF, BMP, WebP, AVIF, ICO, SVG, and HEIC on Safari and recent Chromium builds.

Can I use these tools for commercial work?

Yes. There is no licence attached to the output and no restriction on what you do with it. Your files stay yours.

How do I report a bug or request a tool?

Use the contact page. Bug reports are genuinely useful here, because a browser-specific failure in an image pipeline is usually a bug we have not seen yet.