Code to Image Converter

About Code to Image Converter

How Code to Image Works

The tool renders your code onto an HTML5 Canvas element at 2x resolution, then exports it as a PNG file. Here is what happens step by step:

1. Paste or type your code into the editor.
2. Select the programming language so the tokenizer knows which keywords, strings, comments, and operators to highlight.
3. Pick a theme (Midnight, Dracula, GitHub Light, Monokai, or Nord) and a background gradient.
4. Adjust padding, font size, border radius, and toggle the macOS window dots and line numbers.
5. Click Export as PNG. The Canvas API draws the background gradient, the editor window with rounded corners and a drop shadow, the optional window chrome dots, line numbers, and every syntax-highlighted token. The result is exported at 2x pixel density.

Worked example: A 20-line JavaScript snippet at 14px font size with 48px padding and the Midnight theme produces a canvas roughly 800 x 580 CSS pixels. At 2x scale the exported PNG is 1,600 x 1,160 physical pixels - sharp enough for retina displays and high-DPI monitors. The entire render takes under 100ms in a modern browser.

PNG uses the DEFLATE compression algorithm (a combination of LZ77 and Huffman coding) defined in the W3C Portable Network Graphics specification. The compression is lossless, so every pixel of your syntax-highlighted code is preserved exactly as rendered.

Supported Languages and Themes

The built-in syntax highlighter covers 20 languages across web, backend, mobile, scripting, and data formats:

Category	Languages
Web	JavaScript, TypeScript, HTML, CSS
Backend	Python, Go, Rust, Java, C, C++, C#, PHP, Ruby
Mobile	Swift, Kotlin
Scripting	Bash
Data	SQL, JSON, YAML
Markup	Markdown

Each language has its own keyword set. The tokenizer identifies keywords, strings (single, double, and backtick quotes with escape handling), single-line comments (// for C-style, # for Python/Bash/Ruby/YAML, -- for SQL), block comments (/* */ and <!-- -->), numbers (including hex literals), function calls (any identifier followed by an opening parenthesis), and operators. SQL keywords are matched case-insensitively, so SELECT and select both highlight correctly.

Five editor themes cover the most popular colour palettes:

Theme	Style	Best For
Midnight	Dark navy with bright syntax colours (Catppuccin-inspired)	General purpose, high contrast
Dracula	Dark purple with pink, green, cyan accents	Popular across editors, very readable
GitHub Light	White background with subtle colours	Documentation, light-mode contexts
Monokai	Dark brown/green with warm accents	Classic Sublime Text look
Nord	Muted dark blue with soft colours	Calm, Scandinavian-inspired aesthetic

Customisation Options

Setting	What It Controls	Range
Background gradient	Colour gradient behind the code window	8 presets (Sunset, Ocean, Forest, Nightfall, Peach, Sky, Ember, None)
Padding	Space between the code window and image edge	16px to 96px (step 8)
Border radius	Corner rounding on the code window	0 to 24px
Font size	Code text size	10px to 24px
Window dots	macOS-style red/yellow/green dots at the top	On / off
Line numbers	Numbered lines in the gutter	On / off

The background gradient swatches below the preview let you switch between presets with a single click. Choosing "None" produces a transparent background - useful when you want to paste the code window onto a custom-coloured slide or banner.

Where to Use Code Images

Sharing code as plain text often loses its visual context - syntax highlighting, indentation, and formatting vanish when pasting into chat apps, emails, or social media. A well-styled code image with proper highlighting and a clean background draws more engagement than a raw text paste or a link to a Gist.

Platform	Why Images Work Better Than Text
Twitter / X	Code blocks render poorly in tweets - images preserve formatting and colours. Larger font sizes help because Twitter compresses images.
LinkedIn	No code formatting support at all. Images with gradient backgrounds stand out in the feed.
Presentations (slides)	Syntax highlighting in PowerPoint, Keynote, and Google Slides is limited or unreliable. A PNG screenshot looks consistent everywhere.
Blog post hero images	Visually appealing header that communicates the topic instantly without requiring the reader to scroll past a code block.
Documentation	Screenshots ensure consistent rendering across platforms and browsers, regardless of which markdown engine the reader uses.
Discord / Slack	Quick sharing where markdown code blocks lack per-language highlighting or where the code exceeds the platform's character limits.

Tips for Great Code Images

Tip	Why
Keep snippets short (5-15 lines)	Long code blocks become unreadable when scaled down. Focus on the interesting part.
Increase font size for social media	Twitter and LinkedIn compress uploaded images. 16-18px text stays readable after compression.
Use a dark theme for most platforms	Dark backgrounds look better in social feeds and are easier on the eyes at night.
Use GitHub Light for documentation	Matches the white-background context of most docs and wikis.
Enable window dots for a polished look	The macOS red/yellow/green dots add a professional editor feel that viewers recognise instantly.
Format your code first	Clean indentation and spacing make the image look better. Use the JSON Formatter or HTML Prettifier to tidy up before generating.
Pick a gradient that contrasts with the theme	A bright gradient behind a dark code window creates visual depth. Avoid matching the gradient hue to the window background.

Code to Image vs Carbon.sh and Other Tools

Carbon (carbon.now.sh) is the most widely known code-to-image tool. It was created by Dawn Labs and open-sourced on GitHub, where it has around 35,000 stars as of early 2026. Other popular alternatives include Ray.so (from the Raycast team), Snappify (which adds animation features), and CodeSnap (a VS Code extension). This tool differs from all of them by running entirely in the browser with no server component.

Feature	This Tool	Carbon.sh	Ray.so
Privacy	100% browser-side, code never leaves the device	Code sent to server for rendering	Code sent to server
Account required	No	No (GitHub login optional)	No
Languages	20	100+	30+
Themes	5	Many	12+
Export format	PNG at 2x	PNG, SVG	PNG, SVG
Works offline	Yes (once loaded)	No	No
Animations	No	No	No
Cost	Free	Free	Free

The trade-off is straightforward: Carbon and Ray.so support far more languages and themes because they run server-side rendering with full syntax highlighting libraries. This tool supports fewer languages but guarantees that your code never touches a remote server, which matters when working with proprietary or sensitive code.

How the 2x Export Works

Modern displays use a device pixel ratio (DPR) of 2 or higher. A standard 1x render would look blurry on these screens. This tool solves the problem by doubling the canvas dimensions and then applying ctx.scale(2, 2) so all drawing operations are performed at twice the resolution. A 600px-wide preview becomes a 1,200px-wide PNG, and a 1,000px-wide preview becomes a 2,000px-wide PNG. The exported file is a standard PNG with lossless DEFLATE compression, so there is no quality loss from the export step.

The Canvas API's toBlob() method generates the PNG binary, which is immediately handed to a temporary download link. The blob URL is revoked after the download starts, so no image data lingers in memory.

Common Mistakes to Avoid

• Pasting minified code: Minified JavaScript or CSS produces a single ultra-wide line that overflows the image. Run the code through a formatter first - the SQL Formatter handles SQL, and the HTML Prettifier handles HTML and XML.
• Using too small a font size: Anything below 12px becomes hard to read once the image is compressed by social media platforms. Stick to 14-18px for most use cases.
• Choosing a light theme for dark-mode feeds: Most social media apps default to dark mode. A bright white code window can look jarring in that context. Dark themes blend in better.
• Including too many lines: More than 25-30 lines makes the image too tall for most feed layouts. Trim to the essential logic.
• Forgetting line numbers: Line numbers are helpful when referencing specific lines in a tutorial or code review. Turn them on for educational content, turn them off for aesthetic social posts.
• Picking a gradient that matches the editor background: An Ocean gradient behind a dark Midnight theme creates strong visual separation. A dark Nightfall gradient behind the same dark theme makes the window blend into the background and lose its shadow effect.

Recommended Settings by Use Case

Different situations call for different visual configurations. Here are some starting points:

Use Case	Theme	Background	Font Size	Window Dots	Line Numbers
Twitter / X post	Dracula	Sunset	16-18px	On	Off
LinkedIn tutorial	Midnight	Ocean	16px	On	On
Blog header image	Nord	Sky	14px	On	Off
Technical documentation	GitHub Light	None	14px	Off	On
Presentation slide	Monokai	Nightfall	18-20px	On	Off
Code review discussion	Midnight	Forest	14px	Off	On

These are suggestions rather than rules. The live preview updates instantly as settings change, so it is easy to experiment until the image looks right for the specific context.

Privacy and Offline Use

Unlike server-based tools such as Carbon.sh and Ray.so, this code-to-image converter does not send any data over the network. The entire rendering pipeline - tokenization, canvas drawing, and PNG export - runs in the browser's JavaScript engine. Once the page has loaded, it works with no internet connection at all. This makes it safe to use with proprietary source code, unreleased features, API keys embedded in config examples, or anything else that should not leave the local machine.

The exported PNG is created via the Canvas API's toBlob() method and downloaded through a temporary blob URL. The URL is revoked immediately after the download starts, so the image data does not persist in browser memory beyond what is needed for the save dialog.

Sources

• W3C - Portable Network Graphics (PNG) Specification (Third Edition)
• MDN - Window.devicePixelRatio
• MDN - Canvas API: Using Images
• GitHub - Carbon (carbon-app/carbon)