Image generation API pricing is quoted per plan, not per image, so the number worth comparing is cost per 1,000 images at the entry tier. This table normalizes eight tools from the pricing pages linked below. It includes the two that are cheaper than jsontoimg at this tier, because a comparison that hides them is an ad.
Entry tier, per 1,000 images
| Tool | Entry plan | Included | Per 1,000 | Credit pool |
|---|---|---|---|---|
| RenderForm | $19/mo | 1,000 | $19.00 | images |
| APITemplate.io | $29/mo | 1,500 | $19.33 | mixed |
| Orshot | $39/mo | 1,500 | $26.00 | mixed |
| Templated | $29/mo | 1,000 | $29.00 | mixed |
| DynaPictures | $29/mo | 1,000 | $29.00 | mixed |
| jsontoimg Starter | $29/mo | 1,000 | $29.00 | stills and PDF only |
| Placid | $19/mo | 500 | $38.00 | images |
| Bannerbear | $49/mo | 1,000 | $49.00 | mixed |
Plan sizes and prices were taken from each vendor’s public pricing page and change often. Confirm on the vendor’s page before you commit. This table covers entry tiers only; higher tiers on every vendor lower the per-image price.
Where jsontoimg is cheaper, and where it is not
At the entry tier, RenderForm ($19.00) and APITemplate.io ($19.33) cost less per 1,000 than jsontoimg Starter ($29.00). jsontoimg’s own curve drops with volume: Pro is $59 for 5,000 images ($11.80 per 1,000) and Scale is $129 for 15,000 ($8.60 per 1,000). Prepaid packs cost $0.02 per image ($5 for 250, $10 for 500, $15 for 750) and never expire, which suits bursty volume better than a monthly plan.
What changes the real cost
- What a credit means. “Mixed” pools share credits with video seconds, animation, or AI features, so 1,500 credits may not buy 1,500 images. jsontoimg bills one credit per successful still or one per PDF page, and failed jobs are free.
- Overage versus a hard stop. jsontoimg returns 402 Payment Required at quota instead of billing overage. Some vendors bill overage per 1,000 credits.
- Expiry. Monthly credits reset; prepaid packs do not.
- PDF pages. A 5-page PDF costs 5 credits at jsontoimg.
Work out your own number
Divide the plan price by included credits, then multiply by the credits one output consumes. At 3,000 images a month, jsontoimg Pro at $59 covers you with 2,000 to spare. Three Starter plans would cost $87 for the same volume, so check where your monthly volume lands against each tier boundary.
Per-vendor detail lives in the alternatives pages: Bannerbear, Placid, APITemplate.io, RenderForm, Templated, DynaPictures, Orshot, HTMLCSStoImage, and Creatomate.
Request-shape comparisons: Placid vs jsontoimg and APITemplate.io vs jsontoimg. Why this API exists at all is in Why I Built a JSON-to-Image API Instead of Puppeteer, and the cost of running your own renderer is in Build vs Buy.
FAQ
How much does an image generation API cost?
Entry plans run from $19 to $49 per month for 500 to 1,500 images, which is $19 to $49 per 1,000 images. jsontoimg Starter is $29 per 1,000, and prepaid packs are $0.02 per image.
Which image generation API is cheapest?
At the entry tier, RenderForm at $19.00 per 1,000 and APITemplate.io at $19.33 per 1,000 are cheaper than jsontoimg Starter at $29.00. At Pro volume jsontoimg drops to $11.80 per 1,000.
Why compare credit pools, not just price?
Several tools share one credit pool between images, video seconds, and AI features. A plan listing 1,500 credits can deliver fewer than 1,500 images if you also render video.
Do prepaid images expire?
Not at jsontoimg. Prepaid packs never expire, and they also work as overflow on a monthly plan.
Related Resources
- How JSON-to-image conversion works — the pillar guide
- Build vs buy for image generation — the cost of running your own renderer
- jsontoimg pricing — current plans and packs
- Alternatives — all comparisons