How to choose an image generation API: what to check before you commit
Most image APIs look alike in a demo: a template, a request, a picture. The differences show up later, with long product names, ten sizes, a marketing team that wants to run batches itself and a quota that runs out mid-month. Here is what to test.
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| title | price | badge |
|---|---|---|
| Fresh summer bowl | $12 | NEW |
| Spicy ramen | $14 | HOT |
| Berry pancakes | $9 | -15% |
The checklist
| What to check | How Bannermatic does it | Why it matters |
|---|---|---|
| Layout with real data | Stacks (auto layout), auto-fit, line limits | Long names and prices must not break the design |
| Sizes | Smart resize and linked sizes | One master for the whole media plan |
| Who can run batches | Built-in automations: Google Sheets, CSV, feeds, schedules | Marketers shouldn’t need a developer for every batch |
| Integration | REST API, batches, HMAC-signed webhooks, OpenAPI | Fits into your backend the way you expect |
| Images by URL | Signed links, cached after the first render | OG images, emails and feeds without backend code |
| Quality control | Every render checked for cut text and blurry images | Find the bad banners without opening all of them |
| Formats | PNG, JPG, WEBP, vector PDF; MP4, WebM, GIF | Print, web and video from the same template |
| Testing for free | Watermarked previews don’t use the quota | You can integrate without burning paid renders |
| Language and currency | Interface in 6 languages; prices in USD, EUR, UAH, PLN, RON | Easier for teams outside the US |
How to run a fair test
- 1
Use your hardest data
The longest product name, a missing photo, a price with a discount. Not the demo text.
- 2
Generate every size you need
Check the wide, square and tall formats from the same template.
- 3
Let a marketer run a batch
If they can’t do it without a developer, the cost shows up later.
Good reasons to try Bannermatic
Free previews while integrating
Preview renders have a watermark and don’t use your quota.
Templates for non-developers
A visual editor with stacks, guides and hotkeys, plus a library of 86 templates.
Honest limits
Failed renders don’t count towards the quota, and rate limits are visible in every response.
Teams and roles
Owners, admins, editors and viewers in shared workspaces.
Questions and answers
Can I migrate templates from another service?
Templates from some services can be imported directly, and any design can come in as SVG. Keep the layer names, and the request format is simple to adapt.
Does Bannermatic generate videos?
Yes. Animated templates render to MP4, WebM or GIF through the same API and automations; video is counted separately, in seconds per month.
Can I try it without paying?
Yes. The free plan includes API access and 50 renders a month, and previews are always free.
Related
Test it on your own templates
Create a free account, build one template and send your real payload.