Batch Rename Image Files Online
Rename hundreds of images at once with prefix, sequence number, or both. Files are repacked instantly into a ZIP — no quality loss because nothing is re-encoded.
· Free forever · No registration
Batch rename means changing the filenames of many images at once using a consistent pattern — for example product_001.jpg, product_002.jpg. Resizo's free tool lets you combine a prefix with a zero-padded sequence number, switch the extension, and enforce lowercase — all in your browser. No image bytes are re-encoded, so quality is bit-for-bit identical to the input.
Drop image files here
or click to browse · JPG · PNG · WEBP · GIF
How Batch Rename Works
Drop files
Add any number of JPG, PNG, or WEBP files.
Configure
Pick prefix, padding, and case. Live preview updates instantly.
Download ZIP
Get all renamed files in a single zipped archive.
Common batch-rename workflows
E-commerce catalogs
Rename product photos to SKU-001_main.jpg format before uploading to Shopify, WooCommerce, or Amazon. Lowercase + underscores avoid URL-encoding issues.
Phone photo archives
Normalize IMG_4521.HEIC or DSC01723.jpg dumps into sequential vacation_2026_007.jpg for cleaner backups.
Client deliverables
Repackage final edits as acme_logo_01.png, acme_logo_02.png, etc. Consistent naming looks professional and is easy for clients to reference.
Filename pattern examples
| Settings | Output example |
|---|---|
Prefix product, pad 3, separator _, lowercase | product_001.jpg · product_002.jpg |
Prefix IMG, pad 4, separator -, UPPERCASE | IMG-0001.JPG · IMG-0002.JPG |
| Sequence only, pad 2, start at 10 | 10.jpg · 11.jpg · 12.jpg |
| Prefix only, keep original name | hero_sunset.jpg · hero_beach.jpg |
Extension override → .webp | photo_001.webp (label only — file bytes unchanged) |
Extension override changes only the file label, not the actual format. To convert bytes, use Batch Convert.
Other Batch Tools
Frequently Asked Questions
Does batch rename change image quality?
No. Batch rename only changes the file name — the original image bytes are repacked unchanged into the ZIP. There is no re-encoding, so no quality loss whatsoever.
Can I rename JPG, PNG, and WEBP files together?
Yes. Drop any combination of image files. Each one keeps its original extension unless you force a specific one in the Extension Override option.
Does the file actually convert when I change the extension?
No. Changing the extension only changes the file label. To actually convert format, use Resizo's Batch Convert tool.
Are my files uploaded anywhere?
Never. All processing happens locally in your browser. Files never leave your device.