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Local canvas render

Code Screenshot Beautifier — turn code into a shareable image (carbon / ray.so style)

The code screenshot beautifier renders your pasted code snippet into a clean, syntax-highlighted image: choose the midnight, night or day color theme and a background, and optionally add a filename. The image includes a mac traffic-light window frame, line numbers, fixed padding, rounded corners and a soft shadow. Export a 2× PNG for tweets, blogs or docs. It renders locally in your browser; your code is never uploaded (snippets often contain keys and internal implementation that shouldn't go to a server first).

Code Screenshot Beautifier builds a finished mockup right in your browser: drop your file, set the frame, export a PNG. Nothing is uploaded, and there is no watermark.

Input
screenshot/art
Proof
frame + crop
Output
PNG export
blank developer monitor on a dark desk with teal screen glow
Scene illustrationPNG
FrameCropSpec
Theme
Background
Filename

How to use code screenshot beautifier

  1. 1Paste your code snippet into the editor.
  2. 2Pick a color theme (midnight / night / day).
  3. 3Choose a background and optionally add a filename.
  4. 4Click "Download 2x PNG"; you can also use "Copy" when your browser supports copying images to the clipboard.

Why use MockCat's Code Screenshot Beautifier

  • Local rendering: your code isn't uploaded — snippets often contain API keys, internal logic and unreleased implementation.
  • Consistent layout: line numbers, a window frame and highlighting for common code tokens are added automatically.
  • PNG export: a fixed 2× pixel density for showing code in blogs and docs.
  • Built to share: devs post code daily on X / blogs / docs; a nice code image reads and travels better.

Frequently asked questions

Is my code uploaded?

No. All rendering happens locally with canvas; your code never leaves your device — which matters for code, since snippets often contain API keys, tokens, internal implementation or unreleased logic.

Which languages are supported?

You can paste code text in any language. One lightweight local tokenizer highlights common keywords, strings, numbers, comments and function names. There is no language selector, and the code is not executed.

How does it compare to carbon.now.sh / ray.so?

Same idea — render code into a syntax-highlighted image with a window frame, background and shadow. Carbon has the most themes; ray.so has polished interactions. MockCat is lighter, bilingual, fully local with no upload, with a background that matches the screenshot mockup tool, plus 2× HD and clipboard copy.

Updated · MockCat team

Sources, review and limits

Last verified

2026-06-17

Author

MockupCat editorial desk

Reviewer

Visual asset export review

Primary sources

  • Browser Canvas APIs
  • Curated mockup frame and lighting presets
  • Common social and app-store size references

Mockups are presentation assets. Check platform upload rules, brand usage rights and final pixel dimensions before publishing.