Bulk Image Converter
Convert a mixed folder of PNG, JPG and WebP files to one format at once, with optional resizing and a single ZIP download.
Your input stays in your browser and is never sent.
Images are converted on this device only and are never uploaded. No sign-up needed.
What the bulk image converter handles (PNG, JPG and WebP in one batch)
Point it at a folder where PNG, JPG and WebP files are mixed together and it brings every one of them out in the single format you choose. There is no need to sort them first or open a different tool per format.
Take the results one at a time, or grab everything as one ZIP. The more images you convert, the more the single archive saves you, both in clicks and in a tidy downloads folder.
One broken file does not stop the run. It stays in the list marked as failed while the rest of the batch finishes.
Convert multiple images at once in three steps
- ChooseDrag every image you want to convert into the "Drop images here" area. PNG, JPG, WebP, GIF and BMP can all be in the same batch.
- AdjustPick the "Output format", set "Resize (applied during conversion)" in the same panel if you want it, then press the convert button.
- SaveDownload the ZIP when it finishes. Individual files are still available with each row's "Download" button.
Resize images in bulk by percentage or pixel while converting
"By percentage" scales every image relative to its own size and keeps the aspect ratio. It is the right choice when the source images are all different sizes and you just want them all smaller.
"By pixels" takes explicit numbers. Enter only a width and the height follows the original ratio, so you can standardise on one width without doing the arithmetic per image. Enter both and you get exactly those dimensions.
When batch image conversion saves the most time
- Moving a blog's images to WebP
- Convert a post's images to WebP and cap their width in the same pass, so the page-speed work is done in one go.
- Making product photos a consistent size
- Product shots taken on different days rarely match. A pixel width applied to the whole batch lines them up.
- Lightening images for a deck or report
- Convert heavy PNGs to JPG and scale them down by percentage to keep the document manageable.
- Normalising files from several people
- Bring everything to one format before you start, so later steps never have to care what came in.
Bulk image converter FAQ
- How many images can I convert at once?
- There is no cap on batch size. No sign-up, no login and no usage limit.
- Are my images uploaded anywhere?
- No. Conversion runs entirely in your browser and the images never travel over the network.
- Can it resize and convert in the same pass?
- Yes. Choose "By percentage" or "By pixels" and the resize happens as part of the same conversion.
- Is PNG transparency preserved?
- It is preserved for PNG and WebP output. JPG has no transparency, so those areas are filled with the color you pick under "Background for transparent areas" (white, black or light gray).
- Does it handle HEIC photos from an iPhone?
- This tool covers PNG, JPG, WebP, GIF and BMP. For HEIC, use the HEIC to JPG/PNG/WebP converter.
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