Rename thousands of files in seconds.

Build a renaming rule once, preview every change live, and apply it to your whole folder in a single click — from a handful of photos to tens of thousands of files.

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Smart Rename

Let AI name your files.

Mass Rename reads what's actually inside a file and gives it a clear, descriptive name. “Untitled.pdf” becomes “Acme Corporation Invoice.” It all runs on-device — nothing is ever uploaded.

Names come from real content — documents, PDFs, and images.

Private by design — runs entirely on your Mac.

Cleaning up messy filenames with Find and Replace

Find & Replace

Clean up messy filenames.

Strip the clutter from hundreds of names at once — “copy”, “(1)”, timestamps, anything. Match with plain text or full regular expressions, and watch the result update live before you commit.

Plain text or RegEx, applied across every file.

Automatic conflict handling so nothing gets overwritten.

Built for scale

Thousands of files, no sweat.

Drop in an entire folder — even tens of thousands of files — and Mass Rename stays smooth and responsive, filling in the preview as you go. Rename files and folders alike.

From ten files to ten thousand — one click.

Undo the entire batch instantly if you change your mind.

Reusable workflows

Build a renamer once. Reuse it forever.

Chain simple steps into powerful rules you can save and organize into folders — then apply them to any batch of files.

Custom Format

Mix your own text with tokens: file name, parent folder, sequence, dates, metadata.

Find & Replace

Swap or strip any text, with full regular-expression support.

Sequence numbers

Auto-number with custom start, step, and digits.

Photo & music info

Rename by dimensions, camera model, tags, or the date taken.

Files & folders

Rename folders too — not just the files inside them.

Preview & undo

See every change before you commit — and undo the whole batch.

Rename smarter, starting today.

Powerful batch renaming with a live preview, on-device AI, and one-click undo — built for Mac.

Download on the Mac App Store Download Free Trial