Concurrent generations
Fire one prompt at every model you care about, all at once. Watch them race in.
One frontend.
Every image model.
Paintball is a fast, local app for generating with every modern image model: OpenAI, Google, Replicate, or any custom checkpoint you can name. Compare side-by-side, iterate in an editor, search your gallery semantically. Your keys never leave your browser.
Plays nicely with
OpenAIGoogle GeminiReplicateFLUXSDXLIdeogramImagen 3+ any Replicate model
A gallery, an editor, and a prompt bar walk into your browser.
Generate in parallel from any model, drop reference images, and iterate from a single prompt. Everything is one keystroke away.
Built for people who actually generate.
Twelve practical things that compound when you use them together.
Editor view
Iterate on a single image with side-by-side comparison and a full edit history you can rewind.
Semantic search
Search your gallery by meaning, not filenames. Embeddings run locally in the background — no upload.
Prompt rewriting
Plug in a text model and one click turns a sketch of an idea into something a diffusion model can actually read.
Upscalers, built in
Promote a thumbnail-grade output to a 4K asset without leaving the gallery. Same models you'd reach for anyway.
Any Replicate model
Paste a Replicate URL. A text model adapts to whatever input and output schema the model exposes. Done.
Reference images
Drop any image as a reference for editing or style transfer. Drag from the gallery, paste from clipboard.
Custom ratios & res
1:1, 16:9, 9:16, 4:3, 21:9 — or punch in arbitrary dimensions and resolution tiers up to 4K.
Masonry gallery
Grid, list, or masonry — whichever helps you spot the keeper faster.
Multi-select actions
Bulk download, delete, or attach as references. Built for sessions, not single shots.
Local-first, keys-local
Your API keys live in your browser. The only thing on a server is a thin Cloudflare Worker that proxies requests.
Prompt variations
Spawn N variants of a prompt with a text model, run them as a batch, keep what works.
If it has an API, it works.
First-class support for the obvious ones. Trivial to add anything else — just paste a Replicate model URL.
gpt-image-1OpenAI
gemini-3.1-flashGoogle
imagen-3Google
flux-1.1-proReplicate
flux-schnellReplicate
sdxl-lightningReplicate
ideogram-v2Replicate
recraft-v3Replicate
real-esrganUpscale
clarity-upscalerUpscale
nano-bananaEdit
+ paste any URLCustom
From zero to generating in about ninety seconds.
No accounts. No subscriptions. No image upload to a stranger's server.
01 / Open
Open Paintball
It's a web app. Bookmark it, open it, you're in. No installer, no signup gate.
02 / Paste keys
Paste your API keys
OpenAI, Google, Replicate. They're stored locally in your browser. Pull them out anytime.
# settings → keys REPLICATE_KEY="r8_••••••••••" OPENAI_KEY="sk-••••••••••"
03 / Generate
Generate, edit, repeat
Type a prompt, pick the models you want to race, hit ⌘↩. Cherry-pick a winner, open it in the editor, keep going.
Stop juggling tabs. Generate everywhere from one place.
Free, open source, runs in your browser. You bring the keys.