Files for Form Validation Testing
A collection of sample files specifically for testing HTML file input validation. Test accept attribute restrictions, maxFileSize enforcement, client-side type checking, server-side validation, and user-facing error messages. Includes files at boundary sizes and with various MIME types to exercise all common validation paths.
Type Validation
Files of different types for testing accept attribute restrictions.
Size Boundary Testing
Files at common size limits for testing maxFileSize validation.
Invalid Input
Files that should be rejected by proper validation.
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Frequently Asked Questions
What validation should I test?
Test file type (MIME and extension), file size (min and max), empty files, multiple files, and corrupted files. Verify both client-side (JavaScript) and server-side validation.
Should I rely on the accept attribute?
No. The HTML accept attribute is a UX hint, not security. Always validate file type server-side using magic byte detection, not just the extension.