Bulk Image Renamer

Convert to SEO-friendly slug is ticked by default. It lowercases the name, drops accents and turns spaces, underscores and punctuation into single hyphens, so Crème Brûlée (2).JPG becomes creme-brulee-2.jpg. Untick it to keep names exactly as typed. The preview under each method follows this setting, so it shows a name exactly as it will be saved. The original extension is always kept, and numbering carries on if you add more images later.

Search engines use the text around an image to work out what it shows, including its file name. Google’s image guidelines recommend short, descriptive names: red-leather-handbag.jpg says far more than IMG_0042.JPG.

• Describe what’s in the picture in a few words, the way someone might search for it, without stuffing in keywords.
• Use lowercase and hyphens. Google recommends hyphens rather than underscores between words in URLs, and spaces turn into %20 in web addresses.
• Rename before uploading. On most websites, including WordPress, the file name becomes part of the image’s address, and renaming a live file breaks links to it.

Alt text describes an image for people who can’t see it: screen readers read it aloud, and browsers show it if the image fails to load. Search engines use it too.

• Describe what matters on that page, such as the product itself on a shop page.
• Keep it brief. The AI is asked for under 125 characters, a common rule of thumb.
• Skip “image of”: screen readers already announce it as an image.
• Purely decorative images should have an empty alt attribute, so screen readers pass over them.
• Check AI suggestions before publishing: they can get details wrong and don’t know your product names.

Export Alt Text saves every name and description as alt-text.json, alt-text.csv (for spreadsheets and bulk import) or alt-text.html, with an img tag for each image.

AI mode uses your own account with Anthropic (Claude) or OpenAI (ChatGPT). Create an API key on the provider’s developer site, paste it in and press Check Key, which tests the key without sending an image.

Each image goes to the provider in its own request, asking for a file name (2 to 4 words, or 4 to 8 for Descriptive) and, if ticked, alt text. The AI gets a smaller copy, no more than 1024 pixels wide or tall, which is plenty to tell what a picture shows. The files you download are always your originals, untouched.

The provider charges your account for every image; Image Toolkit adds nothing. The cost depends on the model and on the size of the image the AI sees, which is why only the smaller copy is sent: with Claude Sonnet 5 or Opus 5, a full-size phone photo would cost over four times as much, for a name that’s no better. Check the provider’s pricing and try a few images before a big batch.

Any image you can add works in AI mode, including iPhone HEIC photos, AVIF and very large photos that a provider would reject at full size. The copy is made on your device, as a JPEG, or as a PNG if the image has transparent areas.

Manual renaming happens entirely in your browser. Your images are never uploaded, and the ZIP holds your original files byte for byte, with new names.

AI mode is the one exception on this site. When you press Process in AI mode, a copy of each image is sent directly from your browser to the provider you picked, using your API key. It never passes through Image Toolkit.

• What’s sent: a copy of the image no more than 1024 pixels wide or tall, the instruction and the model name. The copy is made from the pixels alone, so the file’s name and the metadata inside it, such as GPS location and camera details, aren’t sent.
• Who receives it: only the provider you picked, under its own privacy terms, linked from our privacy policy.
• Your API key is saved in your browser on this device, so you don’t have to paste it each time, and sent only to that provider. Remove Key deletes it, as does clearing this site’s data.