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Controlled server processing

Free Online Image Format Detector

Detect the format from file bytes rather than its extension.

Inputs are sent to this server. Uploads are processed temporarily and not retained. Network diagnostics may query public resolvers or the destination website.

Result



How to use Image Format Detector
Detect the format from file bytes rather than its extension. The server processes bounded inputs. Only public HTTPS endpoints are contacted; internal addresses and unsafe redirects are blocked. External answers can change between requests.
  1. Set Image (JPEG, PNG, WebP or AVIF; maximum 8 MiB).
  2. Run the tool, review the result and its stated limitations, then copy or download if needed.
Example & practical use
Detect the format from file bytes rather than its extension. The example below demonstrates Image (JPEG, PNG, WebP or AVIF; maximum 8 MiB).
Example input:
{
  "image": "Upload a supported image"
}
Result: Actual processed output or live service answers; values depend on the input and request time.
Features & result limitations
The server processes bounded inputs. Only public HTTPS endpoints are contacted; internal addresses and unsafe redirects are blocked. External answers can change between requests.
Frequently asked questions
What inputs does Image Format Detector accept?
Image (JPEG, PNG, WebP or AVIF; maximum 8 MiB)
How should I interpret the Image Format Detector result?
The server processes bounded inputs. Only public HTTPS endpoints are contacted; internal addresses and unsafe redirects are blocked. External answers can change between requests.
Where does Image Format Detector process my data?
Inputs are processed on this server. Uploads use temporary files removed at request end. Public diagnostics contact the named resolvers or website. Private text is not stored in usage counters.