Skip to content
DevLab

⚡ Threshold Test Files

Byte-precise files for boundary-value testing against upload limits.

What is boundary value testing

Many services cap file sizes. Testing at exactly the limit, just under it, and just over it efficiently verifies the validation logic.

Just under (9.9MB / 24.9MB)

Below the limit — upload should succeed.

Exactly (10MB / 25MB)

On the boundary — verify success behavior.

Just over (10.1MB / 25.1MB)

Above the limit — should return an error.

PNG

9.9 MB PNG

10,381,312 bytes
10 MB PNG

10,485,760 bytes
10.1 MB PNG

10,590,208 bytes
24.9 MB PNG

26,109,542 bytes
25 MB PNG

26,214,400 bytes
25.1 MB PNG

26,319,258 bytes

JPG

9.9 MB JPG

10,381,312 bytes
10 MB JPG

10,485,760 bytes
10.1 MB JPG

10,590,208 bytes
24.9 MB JPG

26,109,542 bytes
25 MB JPG

26,214,400 bytes
25.1 MB JPG

26,319,258 bytes

ZIP

9.9 MB ZIP

10,381,516 bytes
10 MB ZIP

10,485,966 bytes
10.1 MB ZIP

10,590,414 bytes
24.9 MB ZIP

26,109,748 bytes
25 MB ZIP

26,214,606 bytes
25.1 MB ZIP

26,319,464 bytes

Upload limits of major services

ServiceLimitTest files
Gmail attachment25MB24.9MB / 25MB / 25.1MB
Discord (free)25MB24.9MB / 25MB / 25.1MB
WordPress (default)10MB9.9MB / 10MB / 10.1MB