Best Carbon Alternative for Offline, Private Code Screenshots (2026)
28 languages. GitHub Dark and Light themes. PNG to file or clipboard. No account, no upload, no watermark.
For backend engineers, DevRel folks, indie hackers, and team leads who paste snippets into tweets, blog posts, README files, slide decks, and code reviews — including snippets from private repos that should never touch a web tool.
Why Look for a Carbon Alternative
Carbon and most web-based code-screenshot tools share a few common friction points:
Pasted code leaves your device
Carbon is a web app — the snippet you paste enters the browser of a remote-hosted page.
API keys and secrets at risk
Pasting a snippet that contains a private token, a DSN, or proprietary logic means it has entered a web tool.
Needs an internet connection
No plane, no air-gapped network, no on-call SSH session without coverage.
Editor friction
Closing the tab loses the snippet — no native macOS or Windows window to command-tab back to.
No PNG-to-clipboard workflow
Carbon downloads to a file every time, then you have to drag it into the post.
Theme lock-in
Carbon's UI keeps you inside its frame — the snippet doesn't pop into your own design canvas easily.
You want a tool that works like a code editor — paste in, image out, nothing touches the network.
Top Carbon Alternatives
1. Diwadi
Type: Desktop (Free)
Platforms: Mac, Windows
Why Choose:
- ✅ 28 programming languages via Shiki (JavaScript, TypeScript, Rust, Go, Python, Swift, Kotlin, SQL, GraphQL, and more)
- ✅ GitHub Dark and GitHub Light themes
- ✅ 7 font sizes from 12 to 24 px
- ✅ Line numbers and a window title field
- ✅ 5 padding presets (None, S, M, L, XL)
- ✅ Solid, gradient, or transparent backgrounds
- ✅ PNG export to file or directly to your clipboard
- ✅ Runs entirely on your Mac or Windows machine — your code never leaves the device
- ✅ No account, no signup, no usage caps, no watermark
vs Carbon:
- Local rendering: Yes vs Carbon's web rendering
- Clipboard: PNG to clipboard vs file-only download
- Native: Mac & Windows vs browser-only
- Account: None vs no signup either, but never an upsell
Best For: Snippets from private repos, offline workflows, anyone who wants a clean PNG straight onto the clipboard
Download Diwadi Free2. Ray.so
Type: Web (Free)
Platforms: Web browser
Why Choose:
- ✅ Beautiful default themes
- ✅ Smooth web UI
- ✅ Background gradients curated by Raycast designers
- ✅ Free with no signup
Limitations:
- ❌ Web-only — your snippet enters the browser of a hosted app
- ⚠️ No offline mode
- ⚠️ No native PNG-to-clipboard from a desktop hotkey
- ⚠️ Designed primarily as a Raycast on-ramp, not a standalone tool
vs Carbon:
- More theme presets than Diwadi
- Web-based vs local rendering
- Free, no signup — same as Carbon
Best For: A public one-off snippet where you want the prettiest web themes
3. Snappify
Type: Web (Freemium)
Platforms: Web browser
Why Choose:
- ✅ Multi-snippet canvas (good for slides and tutorials)
- ✅ Animation / typing-effect export
- ✅ Wide template library
- ✅ Strong design polish
Limitations:
- ❌ Web-only — code is uploaded into the browser tool
- ⚠️ Free tier is limited; paid tiers gate the most useful features
- ⚠️ Account required for project saving
- ⚠️ Heavier than needed for a one-off screenshot
vs Carbon:
- Multi-snippet canvas + animation export
- Web-based vs local
- Paid tiers vs Carbon's free model
Best For: Slide decks or tutorials with multiple snippets and animations
4. codeimage.dev
Type: Web (Free)
Platforms: Web browser
Why Choose:
- ✅ Open source
- ✅ Multi-tab snippets in one image
- ✅ Modern, clean UI
- ✅ No watermark
Limitations:
- ❌ Browser-based — snippet still goes through the hosted instance
- ⚠️ No offline mode in the hosted version
- ⚠️ Self-hosting requires deploying it yourself
- ⚠️ No native desktop hotkey
vs Carbon:
- Open source vs Carbon's open source
- Multi-tab support
- Both web-based
Best For: Multi-tab code images and open-source contributors
5. Codeimg.io
Type: Web (Free)
Platforms: Web browser
Why Choose:
- ✅ Lightweight UI
- ✅ Quick to use for one-off snippets
- ✅ Free with no signup wall
Limitations:
- ❌ Web-only
- ⚠️ Limited theme variety
- ⚠️ No clipboard export, only download
- ⚠️ No native desktop app
vs Carbon:
- Lighter UI than Carbon
- Web-based vs local
- Both free
Best For: Fast one-off snippet exports in the browser
6. Polacode (VSCode extension)
Type: VSCode extension (Free)
Platforms: VSCode extension
Why Choose:
- ✅ Lives inside VSCode — no context switch
- ✅ Uses your existing VSCode theme automatically
- ✅ Free, open source
- ✅ Local — runs inside the editor
Limitations:
- ❌ Only works inside VSCode — not a standalone tool
- ⚠️ Limited styling options vs Carbon
- ⚠️ No background gradients or padding presets
- ⚠️ Requires the extension to be installed and maintained
vs Carbon:
- Also local (like Diwadi) — but tied to VSCode
- No background or padding presets
- Free, open source
Best For: Developers who live in VSCode and want zero context switch
7. Silicon (CLI)
Type: CLI (Free, open source)
Platforms: CLI (Mac, Windows, Linux)
Why Choose:
- ✅ Local — fully offline CLI
- ✅ Open source, Rust
- ✅ Scriptable in build pipelines
- ✅ No browser, no electron
Limitations:
- ❌ Command-line only — no GUI
- ⚠️ Setup required (cargo install or homebrew)
- ⚠️ No visual preview before export
- ⚠️ Theme list curated by the CLI's bundled syntax-highlighting set
vs Carbon:
- Also local (like Diwadi) — but CLI-only
- Scriptable in CI / build pipelines
- Free, open source
Best For: Engineers automating code-to-image generation in scripts or CI
Quick Comparison Table
| Alternative | Type | Price | Languages | Themes | Offline | Clipboard Export | Privacy | Best For |
|---|---|---|---|---|---|---|---|---|
| Diwadi | Desktop | Free | 28 | 2 (GitHub Dark + Light) | ✅ Yes | ✅ PNG to clipboard | 🔒🔒🔒 Local | Privacy-sensitive code |
| Carbon | Web | Free | Many | Many | ❌ No | ❌ Download only | ⚠️ Cloud | General code screenshots |
| Ray.so | Web | Free | Many | Many | ❌ No | ❌ Download only | ⚠️ Cloud | Polished web themes |
| Snappify | Web | Freemium | Many | Many | ❌ No | ❌ Download only | ⚠️ Cloud | Slides + animations |
| codeimage.dev | Web | Free | Many | Many | ❌ No | ❌ Download only | ⚠️ Cloud | Open-source web |
| Codeimg.io | Web | Free | Many | Limited | ❌ No | ❌ Download only | ⚠️ Cloud | Quick web snippets |
| Polacode | VSCode extension | Free | Many | Uses VSCode theme | ✅ Yes | Limited | 🔒 Local | Inside VSCode (also local) |
| Silicon (CLI) | CLI | Free | Many | Bundled set | ✅ Yes | ❌ No | 🔒 Local | CLI / scriptable (also local) |
| Codeshot | Desktop | Paid (Mac App Store) | Many | Many | ✅ Yes | Limited | 🔒 Local | Mac-only paid app |
Privacy: Why Local Code Rendering Matters
⚠️ What happens when you paste code into a web tool
When you paste a snippet into a web code-screenshot tool, that snippet enters the browser session of a hosted app.
For backend engineers, DevRel teams, and contractors, the snippet often contains an API key by accident, a function name from a private repo, an internal table schema, a customer SQL query, or proprietary algorithmic logic.
Even reputable tools have analytics, error reporting, and CDN caching that can incidentally capture the pasted text. A snippet from a private repository, a query that includes a customer ID for a bug report, or an internal SDK function name from an unreleased product is now out of your control.
🔒 How Diwadi handles this
Diwadi renders code locally via Shiki on your own CPU, then exports the PNG to your file system or your clipboard. Nothing is uploaded. Nothing is cached on a server. You can unplug the ethernet cable and it still works.
This is not a claim — it is how the architecture works. There is no server to send the snippet to.
Looking for the same offline story for screenshots and device mockups? See our Shots.so alternative guide.
28 Languages and What Diwadi Ships With
Four categories, 28 total languages via Shiki, plus GitHub Dark and GitHub Light themes.
Web
JavaScript, TypeScript, JSX, TSX, HTML, CSS, SCSS
Backend
Python, Rust, Go, Java, C++, C, C#, Ruby, PHP
Mobile + Systems
Swift, Kotlin, Bash, SQL, GraphQL
Config + Markup
JSON, YAML, TOML, XML, Markdown, Dockerfile, Makefile
Themes Diwadi Ships
GitHub Dark
Dark background, the default for most code editors.
GitHub Light
Light background, the default for blog posts and documentation.
Two themes today (GitHub Dark and GitHub Light). Carbon and Ray.so ship more theme presets — Diwadi ships fewer themes but ships them with PNG-to-clipboard and full offline rendering.
Which Alternative Should You Choose?
Choose Diwadi If
Diwadi
- ✅ You paste snippets from private repos or production code
- ✅ You want offline mode and PNG-to-clipboard
- ✅ You want a native Mac or Windows window
- ✅ You primarily use mainstream languages with GitHub Dark or Light themes
Choose Ray.so If
Ray.so
- ✅ Your snippet is a public one-off
- ✅ You want the prettiest web themes
Choose Snappify If
Snappify
- ✅ You build slide decks or tutorials with multiple snippets
- ✅ You need typing-effect or animation export
Choose Polacode If
Polacode
- ✅ You live in VSCode and want zero context switch
- ✅ You're happy with your current VSCode theme as the snippet style
Stay with Carbon If
Carbon
- ⚠️ You need Carbon's specific theme presets
- ⚠️ You want the shareable URL workflow
- ⚠️ Your snippet is fully public and benefits from Carbon's recognition
Try the Offline Carbon Alternative
28 languages. Local rendering. PNG to clipboard.
Frequently Asked Questions
What is the best free alternative to Carbon?
Diwadi is the best free alternative for engineers who paste code from private repositories or want PNG-to-clipboard — it is a desktop app for Mac and Windows that ships 28 languages via Shiki and renders entirely on your machine. Ray.so and codeimage.dev are reasonable free web options if you prefer staying in the browser, and Polacode is a strong fit if you live in VSCode.
Is there an offline desktop alternative to Carbon?
Yes. Diwadi is a native desktop app for Mac and Windows. The code snapshot generator is part of the Screenshot Beautifier feature and renders entirely on your device using Shiki. You can use it on a plane, on a VPN, or in an air-gapped environment — no internet connection required.
Does Diwadi upload my source code to generate the screenshot?
No. Diwadi runs locally on your computer. The code is highlighted by Shiki, rendered into a canvas element on your own CPU, and exported as a PNG directly to your filesystem or your clipboard. There is no server round-trip, no temporary upload, and no cache.
How many programming languages does Diwadi support?
Diwadi supports 28 languages via Shiki: JavaScript, TypeScript, JSX, TSX, Python, Rust, Go, Java, C++, C, C#, Ruby, PHP, Swift, Kotlin, Bash, YAML, JSON, TOML, XML, HTML, CSS, SCSS, Markdown, SQL, GraphQL, Dockerfile, and Makefile.
What themes does Diwadi ship for code snapshots?
Diwadi ships two themes today — GitHub Dark and GitHub Light. Carbon and Ray.so ship more theme presets, so if your priority is theme variety they may be a better fit. Diwadi's edge is the local rendering and the PNG-to-clipboard workflow, not theme breadth.
Can I copy the code screenshot directly to my clipboard?
Yes. Diwadi can export the PNG to a chosen file path or directly to your system clipboard. You can paste the image straight into a tweet, a Notion doc, a GitHub issue, or a Slack message without first saving it to disk.
Does Diwadi work on Windows?
Yes. Diwadi has native Mac and Windows desktop builds. The code snapshot feature works identically on both. There is no documented Linux build today.
Does Diwadi add a watermark to exported code images?
No. Diwadi does not watermark exports on any tier — there is only one tier, and it is free. The PNG you export is exactly what you see on screen.
Is there a Linux version of Diwadi for code screenshots?
Not currently. Diwadi ships Mac and Windows desktop builds today. If you specifically need a Linux-native code-screenshot tool, Silicon (CLI) is a solid offline option for Linux users, and codeimage.dev runs in any browser.
What if I need a theme or language Diwadi doesn't ship yet?
If you need a theme Diwadi doesn't ship (Diwadi only ships GitHub Dark and Light today), Carbon and Ray.so have larger theme libraries. For an unsupported language, Carbon and Ray.so accept the broadest set; for everything in the 28-language Diwadi list with the GitHub Dark or Light look, Diwadi is the fastest and most private option.