About Code Screenshot Beautifier
Posting code on Twitter, in docs, or in a tutorial works much better as a screenshot than as raw text — formatting survives, copy-paste is intentional, and the design polish makes people stop scrolling. The Code Screenshot Beautifier renders syntax-highlighted code into a canvas, wraps it in a macOS-style window with traffic lights, and lets you export at any resolution. Eleven languages, five themes (Midnight, Dracula, GitHub Dark/Light, Atom One Dark), togglable line numbers and window chrome, padding and corner-radius controls. The syntax engine is a 0-dep regex tokenizer — good enough for screenshots, never causes a 250 KB bundle.
- No uploads
- Browser-only
- Works offline
- 100% free
How it works
- 1
Paste your code
Drop in JavaScript, TypeScript, Python, Go, Rust, HTML, CSS, JSON, Bash, SQL, or Markdown. The tokenizer detects keywords, strings, numbers and comments.
- 2
Style it
Pick a theme (Midnight, Dracula, GitHub Dark/Light, Atom One). Toggle line numbers and the window chrome. Adjust padding and corner radius.
- 3
Export the PNG
Output is a high-resolution PNG sized to the rendered window plus your chosen padding. Drop straight into Twitter, docs, or a slide deck.
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Frequently asked questions
Are my files uploaded to a server?
No. Every tool on SnapToolz runs entirely inside your browser using JavaScript and WebAssembly. Your file is read locally, processed in memory, and the result is offered as a download. Nothing is sent to a server — there isn't one to send to.
Why not Carbon / Codeimg / Ray.so?
Those are excellent — and they all upload your code or run it through their server. SnapToolz' Code Screenshot is the same idea, fully offline. The trade-off: our tokenizer is lighter-weight than the Shiki/Prism backends those tools use, so highlighting quality is good-enough rather than perfect.
Does the tokenizer support my favourite language?
JavaScript, TypeScript, Python, Go, Rust, HTML, CSS, JSON, Bash, SQL, Markdown, and plain text. Adding a new language is ~30 lines of regex — open an issue if you want one specifically and we'll add it.
Can I use my own theme colours?
Five built-in themes for now. Custom themes are an obvious extension; for now you can pick the closest preset and export.
Does the export include the window chrome?
Yes — the entire canvas is exported, chrome and all. Toggle the chrome off if you want just the rendered code on a coloured background.
Does it work offline?
Yes. SnapToolz is a Progressive Web App. After your first visit, the app is cached on your device and every tool keeps working without an internet connection.
Is SnapToolz free?
Yes — every tool is 100% free with no sign-up, no watermark, no hidden tier. The whole platform is open source and we have no plan to gate features.