https://github.com/kane50613/takumi
Render JSX, HTML, and CSS to images without a headless browser. OG cards, animated GIFs, and video frames from Node.js, edge runtimes, browsers, or Rust. Drop-in next/og replacement.
https://github.com/kane50613/takumi
cloudflare-workers css gif html-to-image image-generation jsx nodejs og-image opengraph react rust satori tailwindcss wasm
Last synced: 16 days ago
JSON representation
Render JSX, HTML, and CSS to images without a headless browser. OG cards, animated GIFs, and video frames from Node.js, edge runtimes, browsers, or Rust. Drop-in next/og replacement.
- Host: GitHub
- URL: https://github.com/kane50613/takumi
- Owner: kane50613
- License: apache-2.0
- Created: 2025-06-01T08:19:38.000Z (about 1 year ago)
- Default Branch: master
- Last Pushed: 2026-06-10T00:38:42.000Z (18 days ago)
- Last Synced: 2026-06-10T02:19:53.080Z (18 days ago)
- Topics: cloudflare-workers, css, gif, html-to-image, image-generation, jsx, nodejs, og-image, opengraph, react, rust, satori, tailwindcss, wasm
- Language: Rust
- Homepage: https://takumi.kane.tw
- Size: 245 MB
- Stars: 1,859
- Watchers: 1
- Forks: 37
- Open Issues: 10
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- Funding: .github/FUNDING.yml
- License: LICENSE-APACHE
- Code of conduct: CODE_OF_CONDUCT.md
- Codeowners: .github/CODEOWNERS
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README
# Takumi
**A Rust rendering engine that turns JSX, HTML, and node trees into images. No headless browser required.**
Render OpenGraph cards, animated GIFs, and video frames from Node.js, Cloudflare Workers, browsers, or any Rust application.
Drop-in compatible with `next/og`.
[](https://www.npmjs.com/package/takumi-js)
[](https://crates.io/crates/takumi)
[](https://www.npmjs.com/package/@takumi-rs/core)
[](#license)
[Documentation](https://takumi.kane.tw/docs/) · [Playground](https://takumi.kane.tw/playground) · [Showcase](https://takumi.kane.tw/showcase)
## Why Takumi
Takumi is a rendering pipeline built in Rust for one job: turning markup and CSS into pixels. It parses CSS, lays out the tree, shapes text, composites layers, and encodes the output inside a single binary. A headless-Chromium setup spends around 300 MB of RAM and a browser cold start on the same OG card; Takumi spends a function call.
One engine covers every deployment target. Node.js servers load the native binding, Cloudflare Workers and browsers load the WASM build, and Rust applications embed the `takumi` crate. Prebuilt binaries ship for macOS, Linux (glibc and musl), and Windows, on both x64 and ARM64.
The CSS support reaches past the usual OG-image subset: CSS Grid, `::before` and `::after`, `:is()` and `:where()` selectors, masks and `clip-path`, `backdrop-filter`, `background-clip: text`, conic gradients, RTL text, and Tailwind v4 utilities including arbitrary values.
## Quick Start
```bash
bun i takumi-js
```
### Static image
```tsx
import { render } from "takumi-js";
import { writeFile } from "node:fs/promises";
const image = await render(
Hello from Takumi
,
{ width: 1200, height: 630 },
);
await writeFile("./output.png", image);
```
### API route (`next/og`-compatible)
```tsx
import { ImageResponse } from "takumi-js/response";
export function GET() {
return new ImageResponse(
Hello from Takumi
,
{ width: 1200, height: 630 },
);
}
```
### Animated WebP
```tsx
import { Renderer } from "takumi-js/node";
import { fromJsx } from "takumi-js/helpers/jsx";
import { writeFile } from "node:fs/promises";
const renderer = new Renderer();
const { node, stylesheets } = await fromJsx(
,
);
const animation = await renderer.renderAnimation({
width: 400,
height: 400,
fps: 30,
format: "webp",
stylesheets,
scenes: [{ durationMs: 1000, node }],
});
await writeFile("./output.webp", animation);
```
### Rust
```bash
cargo add takumi
```
Start from the [Rust example](./example/rust).
## Comparison
| Feature | `next/og` (Satori) | Takumi |
| :--------------------------------- | :----------------: | :-----------------------------------------------------------: |
| **Runtime** | Node / Edge | Node, Edge, CF Workers, Browser, **Rust crate** |
| **Template input** | JSX / React | JSX, HTML strings, JSON node trees from any language |
| **Layout** | Flexbox | Flexbox, **CSS Grid**, block, inline, float |
| **Selectors** | Limited | Complex selectors, `:is()`, `:where()`, `::before`, `::after` |
| **`backdrop-filter`, blend modes** | ✗ | ✅ |
| **Animated output** | ✗ | **WebP / APNG / GIF / video frames** |
| **Headless browser** | ✗ | ✗ |
| **`ImageResponse` API** | ✅ Native | ✅ **Compatible** |
Compare rendering output across providers at [image-bench.kane.tw](https://image-bench.kane.tw).
## Who's Using Takumi
- [Dcard](https://dcard.tw) renders post share images
- [Fumadocs](https://fumadocs.dev) generates its docs OG images
- [Nuxt OG Image](https://nuxtseo.com/docs/og-image/renderers/takumi) ships Takumi as a built-in renderer
- [shiki-image](https://github.com/pi0/shiki-image) turns syntax-highlighted code into images
More projects in the [showcase](https://takumi.kane.tw/showcase). Takumi is part of the [Vercel OSS Program](https://vercel.com/oss).
## Core Architecture
Takumi converts any template into a **node tree** with three node kinds: `container`, `image`, and `text`. That tree runs through:
1. **Layout** via [taffy](https://github.com/DioxusLabs/taffy): Flexbox, Grid, block, float, `calc()`, absolute positioning, z-index
2. **Text shaping** via [parley](https://github.com/linebender/parley) and [skrifa](https://github.com/googlefonts/fontations/tree/main/skrifa): WOFF/WOFF2 fonts, emoji, RTL, multi-span inline blocks
3. **Compositing**: stacking contexts, blend modes, filters, transforms, SVG via [resvg](https://github.com/linebender/resvg)
4. **Output**: PNG, JPEG, WebP, ICO for statics; GIF, APNG, WebP for animations; raw RGBA frames for video pipelines
The input contract is a node tree, so any template system that serializes to HTML or JSON can feed it: React, Svelte, Vue, plain strings, or your own serializer in any language.
A **time axis** threads through the pipeline: the renderer takes a timestamp, so a PNG is the tree at `t=0` and a GIF is the same tree sampled across `t`. CSS `@keyframes`, the `animation` shorthand, and Tailwind animation utilities (`animate-spin`, `animate-bounce`, arbitrary values) all resolve at render time.
```mermaid
flowchart LR
A[Templates] --> N[Node Tree] --> P[Rendering Pipeline] --> F[(Raw Pixels)]
C[Stylesheets] --> P
R[Resources] --> P
D(Time Axis) -.-> P
F --> G[PNG / JPEG / WebP / ICO]
F --> H[GIF / APNG]
F --> I[Video frames]
```
## Showcase
| Takumi OG image [(source)](./example/twitter-images/components/og-image.tsx) | Package OG card [(source)](./example/twitter-images/components/package-og-image.tsx) |
| :------------------------------------------------------------------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------------------------: |
|  |  |
| **Prisma-style API card** [(source)](./example/twitter-images/components/prisma-og-image.tsx) | **X-style social post** [(source)](./example/twitter-images/components/x-post-image.tsx) |
|  |  |
| **Keyframe Animation** [(source)](./example/ffmpeg-keyframe-animation/src/index.tsx) | **[shiki-image](https://github.com/pi0/shiki-image)** |
| [](./example/ffmpeg-keyframe-animation/output/animation.mp4) |  |
**More examples:** [Next.js](./example/nextjs), [Cloudflare Workers](./example/cloudflare-workers), [TanStack Start](./example/tanstack-start), [Svelte](./example/svelte), [Rust](./example/rust), [ffmpeg keyframe animation](./example/ffmpeg-keyframe-animation)
- [(Unofficial) Takumi Playground](https://takumi-playground.kapadiya.net/)
## Contributing
Read [CONTRIBUTING.md](./CONTRIBUTING.md). Covers local setup, test commands, fixture workflow, and changeset process.
We welcome bug reports, feature requests, doc improvements, and new example integrations.
## License
MIT or Apache-2.0
