Text-to-image is one of the easiest modalities to try for free: several providers host Flux, Stable Diffusion and SDXL behind a simple API — some with no signup at all, others with a small starting credit. Every provider below was verified to offer free image generation against its own docs.
Watch two catches on each provider's page: whether the free output is watermarked, and whether commercial use is allowed — both vary a lot across free image tiers.
Top pick — Pollinations.ai
No-signup free image generation (Flux/SD) Details →
10 verified providers
| Provider | Free tier | Rate limits | Gotchas |
|---|---|---|---|
| Cloudflare Workers AI | 10,000 Neurons/day, all account plans | 30+ models: LLMs (Llama, Mistral, DeepSeek, Qwen...), embeddings, image, audio | no cardno phonecommercial OKOpenAI-compatible |
| HuggingFace | Free CPU Basic + ZeroGPU for Spaces; Inference Providers has a monthly credit ($0.10/mo on Free plan, $2.00/mo on PRO/Team/Enterprise) | No RPM/TPM published, only credit amounts | no cardOpenAI-compatible |
| Jina AI | 10M free tokens (one-time) across all models — embeddings (v3/v4), rerankers, classifier; plus a keyless Reader (r.jina.ai) for basic use | Free key: 100 RPM / 100k TPM for embeddings & reranker (2 concurrent); keyless Reader 20 RPM | no cardno phonecommercial OKOpenAI-compatible |
| Mixedbread | Starter plan: $5 one-time credit (no card) — embeddings (mxbai-embed-large-v1), reranking, and multimodal search over PDF/image/doc/code | Starter plan: 100 requests/min | no cardno phonecommercial OK |
| Clarifai | One-time $5 credit across serverless models (GPT-OSS-120B, Claude, Llama), vision, embeddings and image generation | 15 requests/second global default (CONN_THROTTLED on exceed) | no cardphone requiredOpenAI-compatible |
| AI Horde | Free crowdsourced text & image generation; anonymous API key '0000000000' (no registration), or register to earn kudos for priority | Queue-based priority via kudos (no fixed quota); anonymous requests get lowest priority under load | no cardno phone |
| Pollinations.ai | Free hosted image models (Flux, Turbo, Stable Diffusion) via a simple GET URL; also text and audio. No signup required to start | Anonymous ~1 request / 15s; free registration (Seed tier) ~1 request / 5s | no cardno phone |
| Runware | $2 in signup credits across first-party image models (FLUX.1/FLUX.2, Stable Diffusion 3, SDXL) on the Sonic Inference Engine — hundreds to thousands of generations | Not publicly specified; per-account concurrency applies | no cardno phonecommercial OK |
| Voyage AI | 200M free tokens on current embedding models (voyage-4, voyage-4-lite, voyage-context-4, voyage-code-3) and on rerankers (rerank-2.5 family); voyage-multimodal-3.5 gets 200M text tokens + 150B pixels — a large one-time complimentary allotment per model | Standard per-model RPM/TPM limits apply; the free-token allotment is the practical ceiling | no card |
| Photoroom | 10 free production calls on the Remove Background API (one-time) plus 1,000 sandbox calls/month on the Image Editing API (watermarked) | 1,000 sandbox calls/month; 10 one-time production calls | no card |
FAQ
Is there a free image generation API?
Yes — Pollinations and AI Horde offer free, no-signup image generation, while Runware, Photoroom and others give a starting credit for first-party Flux/SDXL models.
Can I use free AI-generated images commercially?
Sometimes — it depends on the provider and whether the output is watermarked. Each row flags commercial use, confirmed against the provider’s terms.
Which free image API has no watermark?
Free registration removes the watermark on Pollinations, and providers such as Runware return unwatermarked output on their starting credit. Check the catch on each provider page.