File Tools
Rename hundreds of files at once with custom patterns, analyze where your disk space is being used, find duplicate files wasting storage, encrypt sensitive files with a password, and test glob patterns against file paths—all without installing any desktop software.
The batch rename utility applies naming rules, numbering sequences, case changes, and prefix/suffix additions to multiple files simultaneously.
The disk space analyzer visualizes storage usage by folder so you can quickly identify what is taking up space.
The duplicate file finder scans files by content hash to find exact duplicates.
File Encrypt uses AES encryption to password-protect any file locally.
The glob pattern tester validates wildcard patterns against sample paths before you use them in scripts.
Photographers renaming thousands of image files after an event, developers organizing project assets, and IT administrators auditing storage across departments all rely on tools like these.
Because processing happens in your browser using the File System Access API and Web Crypto API, your files are never uploaded or transmitted anywhere.
The glob pattern tester is particularly useful for writing shell scripts, CI/CD pipelines, and configuration files where wildcard patterns must match exactly.
Frequently Asked Questions
Does the batch rename tool modify files on my computer?
Yes.
It directly modifies files on your filesystem.
How does the duplicate file finder detect duplicates?
It computes a hash of each file's content and compares them.
Files with matching hashes are flagged as duplicates, regardless of their names.
What encryption does File Encrypt use?
File Encrypt uses AES-256-GCM encryption implemented via the Web Crypto API, which runs entirely in your browser without sending data anywhere.
What glob syntax does the pattern tester support?
It supports standard glob syntax including *, **, ?, and character classes [].
Results show which paths match a given pattern in real time.