Bulk file tools
Rename many files by rule, pull out a list of names, and make dummy files for testing. Everything happens in your browser.
New names
You see the result before anything is applied. Duplicate names are flagged — fix the rule before downloading.
Choose files and the new names appear here.
Names to be created
What is this for
For testing upload limits, transfer speed and storage behaviour. The file is built in browser memory and downloaded directly — it never touches a server.
- It is built whole in browser memory, so 512MB is the ceiling.
- Empty content fills with zeros — which compresses to almost nothing, so put some text in for compression tests.