Fake File Metadata Generator

How to use

1. 1️⃣
   Choose your options above
2. 2️⃣
   Click Generate
3. 3️⃣
   Copy your result

Detailed instructions

1. Select a file category from the dropdown — choose 'Mixed' to span all types or a specific category like 'Images' to scope the output.
2. Set the count field to the number of metadata records you need, between 1 and 50.
3. Click Generate to produce the JSON output in the results panel.
4. Copy the full JSON array or individual objects and paste into your test fixtures, seed scripts, or API mock files.
5. Re-run the generator as many times as needed — each run produces a fresh set of names, sizes, and hash strings.

Use Cases

• •Seeding a Postgres staging database with 50 mixed-category file records to test pagination queries
• •Populating Cypress fixtures for a drag-and-drop file upload component in a React app
• •Mocking S3 ListObjectsV2 responses with realistic image metadata for filtering and sorting tests
• •Testing MIME type validation middleware in an Express or FastAPI file upload endpoint
• •Generating Postman collection examples for a document management REST API

Tips

• →Generate 'Mixed' category records when testing a generic file manager; they expose MIME type handling bugs that single-category runs miss.
• →Pair image metadata records with a placeholder image service like picsum.photos by mapping the generated file name to a URL — you get plausible end-to-end mock data.
• →When testing deduplication logic, generate two separate batches and manually copy one hash from the first batch into the second to simulate a real duplicate collision.
• →Video records carry large byte sizes by design; use them specifically to test size-limit enforcement and upload progress UI components, not as general-purpose filler.
• →The ISO 8601 timestamps work directly in SQL INSERT statements — wrap them in single quotes and they'll parse correctly in PostgreSQL, MySQL, and SQLite without conversion.
• →For Postman collections, generate 6 to 8 records, paste them into a collection variable as a JSON array, and iterate with a forEach pre-request script to run the same request against multiple mock files.

FAQ