Frequently Asked Questions

What is a test file generator?

A test file generator creates files on demand for software testing. Instead of hunting for assets, you specify a format (JSON, CSV, PDF, DOCX and 80+ others), a size from 1KB to 10MB, and a content mode — blank, random bytes, or structured dummy data — then download instantly.

Is this test file generator free?

Yes, completely free with no signup or limits. Files are generated in your browser where possible — nothing is uploaded, and your test data never leaves your machine.

Are the generated files really the exact size I ask for?

Yes — text formats plus PDF, PNG, JPG, ZIP and DOCX are byte-exact: a 1 MB download is exactly 1,048,576 bytes. Binary files carry the padding inside a valid structure (PDF comment stream, PNG text chunk, JPEG comment segment, ZIP padding entry), so every file opens correctly in real applications while matching the requested size to the byte.

What file formats can I generate?

Over 80 formats: documents (PDF, DOCX), data (JSON, CSV, XML, SQL), images (PNG, JPG), archives (ZIP), code files (JS, TS, PY, Java) and more. Byte-exact generation covers PDF, PNG, JPG, ZIP, DOCX and all text formats; other binary formats use pre-generated valid files.

Can I generate a large test file (1MB, 10MB, 100MB)?

Yes — pick any size from 1KB up to 100MB. Large files are ideal for testing upload limits, multipart handling, virus scanning queues, and progress bars under realistic load. Generation happens locally in your browser, so even 100MB files download instantly without server round-trips.

What is the difference between blank, random, and structured content?

Blank files contain only padding (pure size testing), random files contain pseudo-random bytes (MIME and hashing tests), and structured files contain valid format-aware dummy data such as real JSON objects or CSV rows — best for parser and UI testing.