Bulk Image Renamer

What the Bulk Image Renamer Does

The Bulk Image Renamer renames an entire batch of images in one pass. Add as many files as you like, set a prefix, separator, counter start, padding, suffix, letter case, and extension, and every new filename is previewed live before you download anything. When the pattern looks right, download every renamed image as a single ZIP file, or grab individual files one at a time.

The tool runs entirely in your browser. Images are never uploaded, filenames and file data stay on your device, and the original files on your disk are never modified. New files are produced with the new names, so you are always working from a safe copy.

How to Use the Bulk Image Renamer

1. Choose files or drag and drop images into the upload panel. You can add more at any time.
2. Set the Prefix, for example "beach-trip", and pick a separator.
3. Choose the counter start number and padding width, for example start at 1 with 3 digits to get 001, 002, 003.
4. Optionally add a Suffix, pick a letter case, and keep or replace the extension.
5. Check the renamed preview list, then press Download ZIP to save everything at once.

Understanding the Naming Pattern

Each filename is built from three parts joined by the separator you choose: prefix, counter, and suffix. Empty prefix or suffix parts are skipped automatically, so the counter is always included. For example, with the prefix "product", the separator "-", a start number of 120, padding of 4, and the suffix "front", the names become product-0120-front.jpg, product-0121-front.jpg, and so on.

• Counter start: the number assigned to the first image. Later images increment from it in the order they were added.
• Padding: keeps sequences aligned. No padding gives 1, 2, 3. Three digits give 001, 002, 003, which sorts correctly in every file manager.
• Separator: hyphen, underscore, period, space, or none. Hyphens are the safest choice for web filenames.
• Suffix: useful for view angles, variants, or drafts, like "front", "back", or "v2".
• Case: force lowercase, uppercase, or keep the text exactly as typed.
• Extension: keep the original extension or rename to .jpg, .png, or .webp. This changes the filename only, not the image format.

Why Rename Images in Bulk?

• Cameras and phones produce meaningless names like IMG_20260412_143052.jpg that tell you nothing about the photo.
• Photographers rename event shoots with the event name and a sequence, such as wedding-smith-001.jpg through wedding-smith-500.jpg.
• E-commerce sellers name product photos with the SKU, color, and angle so the catalog stays consistent.
• Web developers use clean, descriptive names for site assets, which keeps code and asset folders readable.
• Sequential numbering with padding makes files sort in the correct order everywhere.

Image Naming for SEO

Search engines read image filenames, so a descriptive name is a small but real ranking signal for image search. Use hyphens between words rather than underscores or spaces, keep names natural and concise, and match the name to the actual image content. Avoid stuffing keywords or leaving names generic. When you rename images that are already live on a website, set up redirects from the old URLs so existing links and search value are not lost.

Privacy and File Safety

Everything happens locally: files are read with the browser's File API, previewed with temporary object URLs, and packed into a ZIP in memory with JavaScript. Nothing is uploaded to a server, there are no accounts, and no usage limits. Because the tool only creates renamed copies for download, the originals you selected are left untouched.

Related Tools

• Image Compressor shrinks file sizes after renaming so pages load faster.
• Image Resizer resizes images to exact dimensions or social media presets.
• Favicon Generator creates every favicon size and the HTML tags to install them.
• Image to Base64 embeds renamed images directly into HTML or CSS.