What kind of renaming patterns are supported?

Common patterns like adding a prefix or suffix, inserting sequential numbering, and find-and-replace text within existing names.

Can I preview the new names before committing?

Yes, you can see how each file will be renamed before downloading the batch.

How do I get the renamed files back?

They're bundled into a ZIP for download, since renaming happens locally in your browser rather than on your actual file system.

Does Batch File Renamer upload my files to a server?

No. Batch File Renamer runs entirely in your browser using on-device processing, your files never leave your device.

Batch File Renamer

Rename many files at once using a pattern, and download them as a ZIP.

Runs in your browser

Drop files to rename

Choose File

About this tool

Renaming dozens of files one at a time — adding a prefix, fixing numbering, changing a naming convention — is exactly the kind of repetitive task that's fast to describe as a pattern but slow to do by hand, file by file. This tool applies a rename pattern across an entire batch of files at once and packages the results as a ZIP, turning a tedious manual process into one pass over however many files you've selected.

Frequently asked questions

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Rename a file's extension without converting its actual format.

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Combine files into a ZIP archive, or extract files from one.

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Convert between bytes, KB, MB, GB, and their binary (KiB/MiB/GiB) equivalents.

File Type Detector

Detect a file's true type from its byte signature, not just its extension.

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Find identical files among a batch by comparing their content hash.

Hex Viewer

View the raw bytes of any file as a hex and ASCII dump.

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Encode any file as Base64, or decode Base64 back into a downloadable file.

File Metadata Viewer

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Verify a downloaded file against a published SHA checksum.

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