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 — AI Horde
Anonymous, no-signup free generation (variable speed) Details →
11 verified providers
| Provider | Free tier | Rate limits | Gotchas |
|---|---|---|---|
| Cloudflare Workers AI | 10,000 Neurons/day, all account plans | 10,000 Neurons/day (free allocation). Per-task request limits: text generation 300 requests/min (models that require Workers Paid: 20 requests/min per model); text embeddings 3,000/min; speech recognition, text-to-image, translation, image-to-text 720/min | no cardno phonecommercial OKOpenAI-compatible |
| HuggingFace | Free CPU Basic + ZeroGPU for Spaces; Inference Providers has no included credit on the Free plan (credits must be purchased) — $2.00/mo is included only on PRO/Team/Enterprise | No RPM/TPM published, only credit amounts | no cardOpenAI-compatible |
| OVHcloud AI Endpoints | Seven models are currently listed as Free: two Qwen3Guard moderation models, Stable Diffusion XL and four NVIDIA Riva TTS voices; access is available anonymously or with an API key tied to a Public Cloud project | Anonymous access: 2 requests/min per IP per model. Authenticated (API key): 400 requests/min per project per model. Exceeding either returns HTTP 429 | no cardOpenAI-compatible |
| Jina AI | 10M free tokens (one-time) across all models — embeddings, rerankers, classifier; plus a keyless Reader (r.jina.ai) for basic use | Free key: 100 RPM / 100k TPM for embeddings & reranker; Reader 20 RPM keyless, 500 RPM with a free key | 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 | Quest Pollen: create an account, complete eligible Quests on the Quests dashboard and claim the rewards; Quest Pollen is spent before paid Pollen on regular (non-paid-only) models. No anonymous/no-key generation — every generation endpoint requires an API key and costs Pollen ($1 ≈ 1 Pollen). Text, image, video, audio, embeddings and 3D models behind one OpenAI-compatible API | No per-request rate limits published for sk_ keys; usage is bounded by the Pollen balance (legacy raw pk_ keys: 1 Pollen per IP per hour) | no cardno phoneOpenAI-compatible |
| Runware | $2 in free credits for new users who sign up with a business email, usable on the Models API (image, video, audio, LLM and 3D models) on the Sonic Inference Engine | Per-organization REST rate limit counted in results per second (number not published; "sits far above typical traffic"); no hard concurrency limit (2-4 concurrent requests recommended) | no cardno phonecommercial OK |
| Voyage AI | 200M free tokens per model on current embedding models (voyage-4-large, voyage-4, voyage-4-lite, voyage-context-4, voyage-code-4) and on the rerankers listed in the price table (rerank-3, rerank-3-lite); voyage-multimodal-3.5 and voyage-multimodal-3 get 200M text tokens + 150B pixels; legacy voyage-finance-2, voyage-law-2 and voyage-code-2 get 50M — a one-time complimentary allotment per account | No numeric limit published for accounts without a payment method. With a payment method (Tier 1, free tokens still apply), per model: voyage-4 / voyage-code-4 8M TPM, 2,000 RPM; voyage-4-large / voyage-context-4 3M TPM, 2,000 RPM; voyage-4-lite 16M TPM, 2,000 RPM; voyage-multimodal-3.5 2M TPM, 2,000 RPM; rerank-3 / rerank-2.5 2M TPM, 2,000 RPM; rerank-3-lite / rerank-2.5-lite 4M TPM, 2,000 RPM. HTTP 429 on exceed | 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 — AI Horde (anonymous, queue-based) and OVHcloud AI Endpoints (Stable Diffusion XL, anonymous at a low rate limit) need no signup, while Pollinations (credits earned through Quests), Runware and others give credits for hosted Flux and SDXL models, and Photoroom gives free background-removal and editing calls.
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?
Watermark terms vary and change: Photoroom, for example, does not watermark its free production calls but does watermark its sandbox calls. Check the catch on each provider page.