Write Us

Scribble Diffusion

Scribble Diffusion is an open-source AI image generator that turns a rough sketch and a short text prompt into a finished picture. Built by Replicate, it runs a ControlNet scribble model in the browser through a simple drawing canvas. It suits hobbyists, teachers and developers learning image AI. The hosted demo is free, though its current availability is unconfirmed.

What is Scribble Diffusion?

Scribble Diffusion is a free, open-source web app that converts a rough drawing into a detailed AI image. You sketch on a canvas, add a short prompt, and get an image that follows your lines. Zeke Sikelianos at Replicate announced it in February 2023 as a showcase for the Replicate API.

The app sends your scribble to a ControlNet model on Replicate, which guides Stable Diffusion with your outline. The Next.js code is on GitHub. Directories still list it, but we could not confirm in October 2026 that the hosted demo still generates images.

Key Features

  • Sketch canvas: Scribble Diffusion gives you a browser canvas for drawing outlines with a mouse, trackpad or finger. No design software or account has been needed, so a rough doodle is enough to begin.
  • Text prompt: A short text prompt tells the model what the sketch should become and in what style. The prompt sets subject and look, while your lines set the layout of the final picture.
  • ControlNet guidance: Scribble Diffusion sends your sketch to a ControlNet scribble model on Replicate, which steers Stable Diffusion. The finished image keeps the composition of your lines rather than inventing a fresh layout.
  • Shareable results: Each generated image gets its own link that you can send to others. Results can also be downloaded, which suits quick mock-ups, classroom examples and early concept thumbnails.
  • Open source code: The Next.js and Tailwind CSS project is public on GitHub under the MIT licence. The repository shows about 3,000 stars and 595 forks, making it a well-known Replicate reference app.
  • One-click deploy: A Vercel template launches your own copy once you add a Replicate API token. Running it locally needs only Node.js, an npm install and a development server, according to the README.

Pros

  • No cost to try: The hosted demo has not required payment or sign-up. Directories agree on free access, so anyone can test sketch-to-image generation within a minute when the site is online.
  • Very low learning curve: A doodle and one sentence are enough to get a result. Students, hobbyists and non-designers can try image AI without learning prompt syntax or any editing software.
  • Layout control: Your outline decides where the subject, horizon or figure sits in the frame. Prompt-only generators cannot place elements this precisely, so it suits quick thumbnails and wireframe ideas.
  • Good teaching tool: Scribble Diffusion shows clearly how ControlNet steers an image model. Teachers can demonstrate the link between an input sketch and the output picture within a single lesson.
  • Developer friendly: The small, MIT-licensed codebase works as a starter project for Replicate apps. Developers can fork it, swap the model and deploy their own version on Vercel.

Cons

  • Status uncertain: We could not confirm in October 2026 that the hosted demo still generates images. Reviewers also report crashes during busy periods, so do not rely on it for deadline work.
  • Low resolution: One review page reports output at 512 by 512 pixels. That size is too small for print or most social media formats without separate upscaling in another tool.
  • Few controls: The hosted app has no seed, size or strength settings. Reviewers note you cannot refine a single element, so fixing one detail means regenerating the whole image.
  • Inconsistent results: Complex or detailed prompts often produce unpredictable images, according to reviews. Simple subjects work best, and several attempts may be needed for an acceptable result.
  • Ageing model: Its 2023 ControlNet model trails newer image generators on detail and realism. One directory also reports that search interest has fallen sharply since its peak.
  • Public outputs: Results have appeared in a public gallery. Avoid sketching anything private or confidential, since a shared link or gallery entry may be visible to other people.

Who is Using Scribble Diffusion?

  • Hobbyists: They turn doodles into fun illustrations.
  • Teachers and students: Classes use it to demonstrate image AI.
  • Concept artists: Designers test quick thumbnails.
  • Developers: Engineers fork it to learn Replicate.

Pricing

The hosted version of Scribble Diffusion has been free to use, and the source code is free to download (checked October 2026).

Plan Price What you get
Hosted demo Free Sketch-to-image generation, if online
Self-hosted Free code, pay-per-use Replicate API Your own copy, billed for compute

Directories agree the demo is free, though none lists current Replicate compute rates. Hosting costs vary with usage, so check Replicate billing before deploying a public copy.

What Makes Scribble Diffusion Unique?

Your own outline drives the composition, which is something prompt-only generators cannot match. Placing a horizon or a figure exactly where you want it takes a few strokes. Its small open-source codebase also works as a reference project for developers.

Compatibilities and Integrations

  • Platforms: Any modern desktop or mobile browser.
  • Replicate API: Self-hosting needs a Replicate API token.
  • Deployment: Next.js app with a Vercel template.
  • Export: Download images or share their links.

Scribble Diffusion Tutorials

A first image takes about a minute once the page loads.

  1. Open the Scribble Diffusion site or your copy.
  2. Sketch your subject.
  3. Type a short prompt.
  4. Press Go and wait.
  5. Download the image or redraw.

How We Rated It

Criterion Score Why
Accuracy and Reliability 3.2 Loose sketches can drift
Ease of Use 4.6 Draw, type, click generate
Functionality and Features 2.9 Single sketch-to-image task only
Performance and Speed 3.6 Usually seconds per image
Customization and Flexibility 2.8 No sliders or style presets
Data Privacy and Security 3.4 Public gallery, minimal account data
Support and Resources 3.3 GitHub README, no help desk
Cost-Efficiency 4.8 Free hosted demo
Integration Capabilities 3.9 Forkable Next.js code and API
Overall Score 3.6 Average of the nine criteria

Summary

Scribble Diffusion suits beginners, educators and developers who want a quick, free way to see sketch-guided image generation in action. Its main limitation is scope: one model, few settings and an uncertain demo. If the public site does not respond, deploy the GitHub version with your own Replicate token.

FAQ

Frequently Asked Questions

Find answers to the most common questions about our services, reviews, tools, platforms, and more.

Scribble Diffusion is used to turn a rough hand-drawn sketch and a short text prompt into a finished AI image. People use it for quick concept art, classroom demonstrations of ControlNet, playful doodle makeovers and as a sample project for learning Replicate.

Yes. The hosted demo has been free to use without an account, and the source code is public on GitHub. If you deploy your own copy, Replicate bills you for the compute time each generation uses, so costs depend on traffic and volume.

We could not confirm it in October 2026. Directories still list the hosted demo, but the site may be slow or offline at times. The open-source code remains available, so you can run your own copy with a Replicate API token if needed.

Replicate built it. Zeke Sikelianos announced the project in February 2023 as a free, open-source example of a web app powered by models hosted on Replicate, with the front end written in Next.js and designed for easy deployment on Vercel.

It uses a ControlNet scribble model hosted on Replicate, which conditions Stable Diffusion on the lines you draw. That conditioning keeps the layout of the generated image close to your sketch while the prompt controls subject, colour and overall artistic style.

Yes. You can clone the GitHub repository or use the Vercel template, then add your own Replicate API token. Your deployment calls the same scribble model, and Replicate charges your account for the compute time each image request consumes.

Not fully. Results get shareable pages and have appeared in a public gallery, so avoid confidential sketches on the hosted demo. A self-hosted copy gives you more control over storage, and you should check the code before handling any client material.

Good options include Stable Doodle from Stability AI, Krea for real-time sketch generation, Leonardo AI with its sketch-to-image tools and Adobe Firefly. Each offers more settings and newer models, although most limit free use through credits or paid plans.

Scribble Diffusion is used to turn a rough hand-drawn sketch and a short text prompt into a finished AI image. People use it for quick concept art, classroom demonstrations of ControlNet, playful doodle makeovers and as a sample project for learning Replicate.

Yes. The hosted demo has been free to use without an account, and the source code is public on GitHub. If you deploy your own copy, Replicate bills you for the compute time each generation uses, so costs depend on traffic and volume.

We could not confirm it in October 2026. Directories still list the hosted demo, but the site may be slow or offline at times. The open-source code remains available, so you can run your own copy with a Replicate API token if needed.

Replicate built it. Zeke Sikelianos announced the project in February 2023 as a free, open-source example of a web app powered by models hosted on Replicate, with the front end written in Next.js and designed for easy deployment on Vercel.

It uses a ControlNet scribble model hosted on Replicate, which conditions Stable Diffusion on the lines you draw. That conditioning keeps the layout of the generated image close to your sketch while the prompt controls subject, colour and overall artistic style.

Yes. You can clone the GitHub repository or use the Vercel template, then add your own Replicate API token. Your deployment calls the same scribble model, and Replicate charges your account for the compute time each image request consumes.

Not fully. Results get shareable pages and have appeared in a public gallery, so avoid confidential sketches on the hosted demo. A self-hosted copy gives you more control over storage, and you should check the code before handling any client material.

Good options include Stable Doodle from Stability AI, Krea for real-time sketch generation, Leonardo AI with its sketch-to-image tools and Adobe Firefly. Each offers more settings and newer models, although most limit free use through credits or paid plans.

Scribble Diffusion is used to turn a rough hand-drawn sketch and a short text prompt into a finished AI image. People use it for quick concept art, classroom demonstrations of ControlNet, playful doodle makeovers and as a sample project for learning Replicate.

Yes. The hosted demo has been free to use without an account, and the source code is public on GitHub. If you deploy your own copy, Replicate bills you for the compute time each generation uses, so costs depend on traffic and volume.

We could not confirm it in October 2026. Directories still list the hosted demo, but the site may be slow or offline at times. The open-source code remains available, so you can run your own copy with a Replicate API token if needed.

Replicate built it. Zeke Sikelianos announced the project in February 2023 as a free, open-source example of a web app powered by models hosted on Replicate, with the front end written in Next.js and designed for easy deployment on Vercel.

It uses a ControlNet scribble model hosted on Replicate, which conditions Stable Diffusion on the lines you draw. That conditioning keeps the layout of the generated image close to your sketch while the prompt controls subject, colour and overall artistic style.

Yes. You can clone the GitHub repository or use the Vercel template, then add your own Replicate API token. Your deployment calls the same scribble model, and Replicate charges your account for the compute time each image request consumes.

Not fully. Results get shareable pages and have appeared in a public gallery, so avoid confidential sketches on the hosted demo. A self-hosted copy gives you more control over storage, and you should check the code before handling any client material.

Good options include Stable Doodle from Stability AI, Krea for real-time sketch generation, Leonardo AI with its sketch-to-image tools and Adobe Firefly. Each offers more settings and newer models, although most limit free use through credits or paid plans.

Scribble Diffusion is used to turn a rough hand-drawn sketch and a short text prompt into a finished AI image. People use it for quick concept art, classroom demonstrations of ControlNet, playful doodle makeovers and as a sample project for learning Replicate.

Yes. The hosted demo has been free to use without an account, and the source code is public on GitHub. If you deploy your own copy, Replicate bills you for the compute time each generation uses, so costs depend on traffic and volume.

We could not confirm it in October 2026. Directories still list the hosted demo, but the site may be slow or offline at times. The open-source code remains available, so you can run your own copy with a Replicate API token if needed.

Replicate built it. Zeke Sikelianos announced the project in February 2023 as a free, open-source example of a web app powered by models hosted on Replicate, with the front end written in Next.js and designed for easy deployment on Vercel.

It uses a ControlNet scribble model hosted on Replicate, which conditions Stable Diffusion on the lines you draw. That conditioning keeps the layout of the generated image close to your sketch while the prompt controls subject, colour and overall artistic style.

Yes. You can clone the GitHub repository or use the Vercel template, then add your own Replicate API token. Your deployment calls the same scribble model, and Replicate charges your account for the compute time each image request consumes.

Not fully. Results get shareable pages and have appeared in a public gallery, so avoid confidential sketches on the hosted demo. A self-hosted copy gives you more control over storage, and you should check the code before handling any client material.

Good options include Stable Doodle from Stability AI, Krea for real-time sketch generation, Leonardo AI with its sketch-to-image tools and Adobe Firefly. Each offers more settings and newer models, although most limit free use through credits or paid plans.

Reviews (0)

Write a Review

Write a Review

Your email address will not be published. Required fields are marked *

Your rating *
Select a rating