Carbon.now.sh alternative · Free · No sign-up
Carbon Alternative That Does More Than Code Screenshots
Carbon nails code cards — and honestly, for a plain snippet image it still holds up. But if you are also making launch mockups, social posts, or short video clips, you end up opening a few extra tabs. KromaStudio keeps code screenshots, browser mockups, and social templates in one place. Everything runs client-side, free, no sign-up.
What KromaStudio Adds Beyond Code Cards
Browser Mockups
Carbon styles code inside a window. KromaStudio can wrap an actual app screenshot in macOS or Windows chrome — handy for launch posts and portfolio shots without a second tool.
Browser mockup generator →Social Media Content Templates
One code image is fine for a quick tweet. For threads, carousels, or a metrics card, you'll want proper layout — not just highlighted syntax.
Social content templates →Animated Exports
Carbon's PNG and SVG stills cover most docs and blog posts. When you want a looping clip for LinkedIn or Reels, KromaStudio can export .webm too.
How animation export works →All-in-One Workflow
Lots of teams use Carbon for the code card, then open something else for mockups or social graphics. KromaStudio keeps code, mockups, and content templates in one tab.
Open KromaStudio →Open Source & Client-Side Privacy
Both are MIT open source — fork it, self-host it, inspect the code. KromaStudio runs everything locally in your browser, no account required.
Privacy policy →Why Developers Look for Carbon Alternatives
If you have used Carbon, you know it is good at what it does. People start looking elsewhere when they need browser mockups, social layouts, or a bit of motion — not just another code card. Here is how KromaStudio handles that.
- You need a real browser frame around a product screenshot — not just code styled inside a window.
- A single code card isn't cutting it; you want tweet cards, LinkedIn layouts, or a metrics snapshot.
- You'd rather export a short looping .webm for Reels or dev Twitter than stop at a static PNG.
- Headlines and gradient backgrounds help your post stand out without opening another design tool.
- You're done switching between Carbon, a mockup app, and something else just to ship one launch thread.
- You want to paste, customize, and export — no account, even though Carbon's saved snippets need a login.
- You like that both tools are open source, but you want mockups and animation in the same repo you can self-host.
What is Carbon?
Carbon (carbon.now.sh) has been around since 2017 — MIT open source, 36k+ GitHub stars, the tool most devs reach for when they need a pretty code image. Paste code, drop a file, or pull in a GitHub gist. Pick a theme, tweak fonts and padding, export PNG or SVG, or grab a share link that previews on Twitter and Slack.
What keeps people on Carbon: 150+ themes, carbon-now-cli for terminal workflows, and defaults that just work. If all you need is a sharp code card — maybe with SVG or CLI automation — it is still hard to beat.
KromaStudio is MIT open source too — you can self-host either project. The difference is scope: Carbon stays focused on code cards; KromaStudio adds mockups, social templates, and .webm export in the same codebase.
KromaStudio vs Carbon
Honest side-by-side below. Both are free, both are MIT open source. The gap is mostly what each tool tries to cover. More detail on our code, mockup, or social content pages for a deeper dive.
| Feature | Carbon | KromaStudio |
|---|---|---|
| Code Screenshots | Excellent — 150+ themes, mature defaults, broad language support | Excellent — Shiki highlighting, 15 themes, headline overlays |
| Browser Mockups | Code window chrome only — not product screenshot frames | macOS, Windows, Minimal browser frames for app screenshots |
| Social Content Posts | Code cards only | 10 templates — Tweet, LinkedIn, Thread, Carousel, Metrics, and more |
| Animated Exports | Static PNG and SVG export | Animated .webm loops (Float, 3D Tilt, Auto Scroll) |
| Theme Library | 150+ syntax themes with deep font and color controls | 15 Shiki themes + 12 gradient presets |
| Automation & CLI | carbon-now-cli, gist URLs, embed URLs, shareable links | Interactive browser studio (no public API yet) |
| Export Formats | PNG, SVG, clipboard copy; shareable links | PNG (2×) + .webm video |
| Snippet Management | Optional account — save snippets, share links, embed in blogs | No account — local browser workflow |
| Open Source | MIT licensed — 36k+ GitHub stars, self-hostable | MIT licensed — open source on GitHub, self-hostable |
| Ease of Use | Very mature — paste, drop file, or load a GitHub gist | Fast — three modes, more options |
| Developer Workflow | Focused code tool + CLI and embed ecosystem | All-in-one — code, mockups, social, animation |
5 Key Differences Between Carbon and KromaStudio
Browser Mockups
Carbon puts your code in a styled window. When you need a product screenshot sitting inside browser chrome for a launch thread, that's usually a different app.
KromaStudio Image mode wraps any screenshot in macOS, Windows, or Minimal frames — padding, shadows, aspect ratio — and exports a PNG from the same place.
Try browser mockups →Social Content Creation
A code card works for a single tweet. Announcements, threads, and carousels need more structure than syntax highlighting alone.
Content mode has ten templates — Tweet, LinkedIn, Thread, Carousel, Metrics, and more — with editable author fields so posts stay on-brand.
Explore social templates →Animated Exports
Carbon's PNG and SVG output is polished — great for docs, blogs, and embeddable snippets. It doesn't do motion.
KromaStudio can export a .webm loop (Float, 3D Tilt, Auto Scroll) from the same snippet — one PNG for the feed, one clip for short-form video.
See export steps →Theme Library & Automation
Carbon has had years to build out 150+ themes, carbon-now-cli, gist URLs, and embed links. Hard to argue with that depth.
KromaStudio trades theme count for breadth — 15 curated themes, but mockups, social layouts, and .webm from one editor. Pick Carbon for CLI and themes; pick KromaStudio when you want fewer tabs open.
Code screenshot generator →Privacy & Open Source
Carbon is MIT licensed with 36k+ GitHub stars. Self-host it, save snippets in the cloud if you sign in — it's been the standard for a reason.
KromaStudio is MIT open source too. Self-host it, skip the account, and keep code, mockups, and social templates processing locally in your browser.
Read privacy policy →Features That Make KromaStudio Different
Browser Mockup Generator
Drop a screenshot into macOS, Windows, or minimal browser chrome. Tweak padding, corners, shadows, and aspect ratio, then export a PNG ready for a launch post or README hero.
Social Content Generator
Tweet cards, LinkedIn posts, threads, carousels, metrics snapshots — pick a template, fill in author and accent color, export PNG or a looping .webm.
Animated Code Screenshots
Pick Float, 3D Tilt, or Auto Scroll, render a looping .webm at 2× resolution, and post it — no After Effects, no screen recording.
Theme Customization
15 Shiki themes, 12 gradient presets, or roll your own two-color gradient. Toggle line numbers, bump font size, add a headline for social.
Code Screenshot Generator →Privacy-First Client-Side Processing
Everything renders in your browser — nothing gets uploaded. KromaStudio is MIT open source on GitHub, same as Carbon, so you can self-host if you want full control.
Privacy policy →Fast Export Workflow
Paste code, pick a theme, download a sharp 2× PNG in seconds. Same canvas does static PNG and animated .webm — one workflow for docs, feeds, and launch threads.
How it works →Other Carbon Alternatives to Consider
No single tool does everything. These come up a lot when people compare notes with Carbon:
- Ray.so — Fast, minimal code cards with polished defaults and URL-based PNG generation
- Snappify — Animated code presentations, diffs, and VS Code integration (paid tiers for advanced features)
- CodeImage — Deep static customization and self-hosting (open source)
- Chalk.ist — Minimal, open-source code images with multiple blocks in one image
- Hackreels — Animated code diff videos in 4K, GIF, or WebM (paid render time)
For a detailed Ray.so comparison, see our KromaStudio vs Ray.so page. KromaStudio fits when you want code screenshots plus product browser mockups, social post templates, and client-side .webm animation — free, in one studio, without combining three separate tools.
Who Should Use KromaStudio?
Frontend Developers
Share component refactors, CSS tricks, and UI patterns with syntax-highlighted cards — then wrap app screenshots in browser frames for portfolio pieces.
Backend Developers
Post API handlers, database queries, and config snippets with syntax highlighting rendered in your browser. Export clean PNGs for internal docs or public blog posts.
Indie Hackers
Ship launch graphics, metrics cards, and product mockups from one free tool — no separate design subscription required for a polished build-in-public thread.
Startup Founders
Create announcement cards, before-after stories, and browser mockups for Product Hunt, LinkedIn, and investor updates — all from the same studio.
Technical Writers
Produce consistent code callouts for documentation and tutorials. Use the same theme across every article so readers recognize your brand instantly.
Developer Advocates
Turn conference snippets, sample repos, and tutorial code into share-ready visuals — static for blogs, animated for social reach.
Real Use Cases
- Sharing a refactored React hook on LinkedIn with a headline overlay and gradient background Code screenshots for LinkedIn →
- Embedding syntax-highlighted snippets in a technical blog post or Dev.to article Blog-ready code images →
- Wrapping a product screenshot in a macOS browser frame for a launch announcement Launch mockups →
- Creating documentation screenshots with consistent Dracula or Nord theming Theming workflow →
- Building a developer portfolio page with mockup-style project previews Portfolio mockups →
- Publishing animated code loops for X, LinkedIn, or short-form video feeds Animated export guide →
Why Developers Trust KromaStudio
Runs in Your Browser
Highlighting, mockups, and export happen locally — not on a remote server.
No Account Needed
Open it, paste or upload, export. That's it.
Nothing Gets Uploaded
Your code and screenshots stay on your machine while you work.
Fast Exports
2× PNG and .webm loops render in seconds — no queue, no waiting.
MIT Open Source
On GitHub under MIT — read the code, self-host, fork, or contribute.
Free
Code, mockups, templates, animation — no paywall on the core studio.
Create More Than Code Screenshots
Code, screenshots, mockups, social cards — one free tool. No account needed.
Frequently Asked Questions
- What is the best Carbon.now.sh alternative?
- Depends what you're making. Carbon is still great for pure code cards. Ray.so is fast if you want URL-based PNGs. Chalk.ist and CodeImage are solid open-source picks. Snappify and Hackreels if you need animated code video. KromaStudio fits when you want code shots plus mockups, social templates, and .webm export in one free, open-source studio.
- Is KromaStudio free?
- Yes — no sign-up, no paywall on the core studio.
- Is Carbon better than KromaStudio for code screenshots?
- For raw code cards, Carbon has the edge: 150+ themes, SVG, embed links, and carbon-now-cli. KromaStudio makes more sense when you also need mockups, social layouts, headlines, or a .webm clip — and you'd rather not juggle three apps.
- Can I create browser mockups?
- Yes. Switch to Image mode, drop in a screenshot, pick macOS, Windows, or Minimal chrome, and export. Browser mockup generator →
- Can I export animated screenshots?
- Yes. Open the Animate panel, pick Float, 3D Tilt, or Auto Scroll, and render a .webm — all in the browser. Export guide →
- Does KromaStudio upload my code?
- No. Highlighting, rendering, and export all happen locally. Your code and images stay on your device.
- Can I use KromaStudio without signup?
- Yes. Open the studio, paste or upload, export — no account needed.
- What export formats are available?
- KromaStudio exports 2× PNG and .webm loops. Carbon also does SVG and shareable embed links.
- Is KromaStudio open source?
- Yes — MIT licensed on GitHub. Self-host the whole studio if you want; rendering stays client-side. View on GitHub →
- How does KromaStudio compare with Carbon?
- Both are MIT open source. Carbon is the classic code-screenshot tool — huge theme library, SVG, CLI, big community. KromaStudio does code shots too, plus mockups, social templates, and .webm video in one place.
- Can teams use KromaStudio?
- Sure — share the exported PNGs and .webm files however you like. There's no shared cloud account; each person uses the studio locally.
Final Verdict
Stick with Carbon if you want 150+ themes, SVG, embed links, or carbon-now-cli in your terminal. For a straight code card, it is still the one to beat.
Try KromaStudio if you are also making browser mockups, social posts, or short .webm clips — and you would rather not hop between three apps. Both are MIT open source; KromaStudio just covers more ground in one repo.