Resize Image
Resize an image by width and height with predictable fit and format controls.
POST /api/free/resize-imageUse Resize Image online
Upload, configure, preview and download without an API key.
1. Upload and settings
Use this tool online without an API key. Files are sent only when you run the request.
2. Preview and download
Preview, size changes and download controls are shown here
Paid batch option
When the same operation must run across several files, open the matching paid batch page.
Integrate with the API
Only programmatic calls require an API key. Parameters, responses and errors are documented below.
POST /api/free/resize-imageOnline use is keyless. Programmatic calls to this endpoint require an APIAny key.
- Width and height must be between 1 and 8192 pixels.
- If height is omitted, the original aspect ratio is preserved.
Response
A successful request returns a image response with the Content-Type described by this page.
Common errors
- 400
- A file or parameter is missing, invalid or outside the documented limit.
- 401
- The API key is missing, invalid or disabled for programmatic API calls.
- 429
- The online or authenticated shared rate limit has been reached.
Parameters and limits
| Parameter | Requirement | Default | Accepted values |
|---|---|---|---|
imageImage file | Required | — | file |
widthWidth | Required | 1200 | number |
heightHeight | Optional | — | number |
fitFit mode | Optional | inside | cover, contain, fill, inside, outside |
formatOutput format | Optional | webp | webp, png, jpeg |
qualityQuality | Optional | 82 | number |
API example
Use this authenticated example in code. The online Playground above intentionally does not request or expose your key.
curl -X POST "https://apiany.ai/api/free/resize-image" \ -H "Authorization: Bearer $API_KEY" \ -F "image=@input.jpg" \ -F "width=1200" \ -F "fit=inside" \ --output resized.webp
Frequently asked questions
Do I need an API key for Resize Image?
No key is required in the online Playground. Programmatic requests use Authorization: Bearer or X-API-Key.
What are the limits for Resize Image?
Online use is limited to 3 requests per minute and 30 per day. Authenticated free accounts receive 5 RPM and paid accounts receive 500 RPM across free APIs.
Which inputs does Resize Image accept?
Use the required and optional fields in the parameter table. Unsupported formats and out-of-range values are rejected.
What does Resize Image return?
Successful requests return a image response. Errors use the HTTP status codes listed above.