What's the difference between Personal and Studio?

Personal ($39) is for one person — unlimited use on one active device at a time. Activate on a new device and the old one signs out. Studio ($199) is for teams and commercial client work — unlimited team members, early access to new tools, and a commercial license.

Do I need an account?

No. Use any tool free up to 5 times per day on compute-heavier tools, and unlimited on lightweight ones. No card, no account, no signup required.

Where are my files processed?

Right on your device. Files never upload to any server. Everything runs in your browser — you can verify in DevTools → Network.

What happens if I use my Personal license on a second device?

The new device activates and the old device signs out. Your license key stays the same — you just move it between devices as needed. No limit on how often you switch.

Does this work on my phone?

Yes. Every tool works on iPhone, Android, tablet, and desktop.

What if I want a refund?

30-day money-back guarantee on both tiers. No questions asked. Email sales@cipherforces.com.

Will you add more tools?

Yes. New tools ship regularly. Your license includes every tool we ever release — Studio members get early access.

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Rename Files in Bulk

Rename many files at once with a pattern.

By Daniel BeglaryanUpdated August 2026

PrivateWorks OfflineNo Account

Quick presets

Template rename

Prefix

Suffix

Sep

Start #

Pad

Sequential numbering

Find

Replace

Case transform

Remove specific characters

Override file extension

Drop your files here

or click to browse

Max 100MB

0/5free today

Deep dive

About Rename Files in Bulk.

Rename Dozens of Files at Once With Pattern Substitution

Drop a folder of files and CipherForces Bulk File Rename applies a pattern — add prefix, add suffix, replace text, zero-pad numbers, sequential numbering, extension change. Preview every new filename before confirming. Files stay on your computer.

Common Use Cases

Photo organization: Rename IMG_4523.jpg → vacation-2024-001.jpg across 500 photos.
Cleanup: Remove spaces, special characters, or casing inconsistencies from filenames.
Sequential numbering: Add 001, 002, 003 to the end of every file.
Preparing for CMS: Ensure filenames match your CMS's allowed-character rules before upload.

Key Features

Find & replace: Literal or regex-based substitution.
Prefix/suffix: Add text before or after every filename.
Sequential numbering: {n}, {n:03} for zero-padded counters.
Live preview: Every old → new pair shown before you click "Rename".

Privacy: Uses the browser's File System Access API — files stay on your machine throughout.

FAQ

Frequently asked questions.

How do I rename multiple files at once with a pattern?

Drop your files into the tool, then set a pattern: add a prefix or suffix, turn on sequential numbering, or use find and replace. A live preview shows each new name as you type. When it looks right, click rename and download the results as a ZIP.

Is it safe to bulk rename files here without uploading them?

Yes. Every file stays on your device. The tool runs entirely in your browser using JavaScript, so nothing is sent to a server. There is no signup and no account needed. You can even disconnect from the internet after the page loads and the renaming still works.

Can I add sequential numbers to a batch of file names?

Yes. Enable sequential numbering, then choose a start number and how many digits to pad to, like 001, 002, 003. Combine it with a prefix such as a date or product name. The live preview updates instantly so you can confirm the format before applying it.

Does the tool change my original files on disk?

No. Your original files are never modified. The tool reads each file, builds the new names you defined, and gives you fresh copies to download as a ZIP. It also warns you if two files would end up with the same name, so nothing gets accidentally overwritten.

Three steps