Batch convert images in your browser
Converting images one at a time is fine for a single photo but painful for a folder. This tool takes up to 50 files, converts each to the format you choose with the same quality setting, and bundles the results into a ZIP with the original file names and the new extension.
It is especially handy for mixed folders: iPhone HEIC photos next to PNG screenshots and old BMP files can all become JPG or WebP in one pass. Decoding happens locally, including HEIC and TIFF, so nothing is uploaded.
How to convert images in bulk
Step 1: Add your images
Drop up to 50 files. Mixed formats are fine.
Step 2: Choose the target format
JPEG, PNG or WebP. WebP is the default.
Step 3: Set the quality
For JPEG and WebP, use the slider (90 percent by default).
Step 4: Convert and download the ZIP
Files are processed one after another; download individually or all at once.
Batch conversion features
Up to 50 files per batch
Each file can be up to 100 MB.
Mixed input formats
JPG, PNG, WebP, GIF, BMP, AVIF, TIFF, HEIC and SVG in the same batch.
Names preserved
photo.heic becomes photo.jpg, so folders stay organized.
Progress per file
See which files are done and download any of them individually.
Typical batch conversions
iPhone photos for Windows users. Turn a set of HEIC files into JPGs anyone can open.
Website image migration. Move a folder of PNG and JPG assets to WebP.
Standardizing a folder. Make every image the same format before importing into another tool.
Archive clean-up. Convert legacy BMP and TIFF files to lighter formats.
Quality and transparency in batches
The quality slider applies to every file in the batch. For photos, 80 to 90 percent keeps them looking like the originals. PNG output ignores the slider because it is lossless.
Transparent images keep their transparency as PNG or WebP. When converting to JPEG, transparent areas are filled with white. If a folder mixes logos and photos, consider WebP, which keeps transparency and stays small.
Large batches and performance
Images are converted one at a time on your device, so speed depends on your computer and the image sizes. A batch of phone photos usually finishes in well under a minute on a modern laptop; HEIC files take longer because they are decoded in JavaScript.
For folders with hundreds of images, run several batches of 50. Because nothing is uploaded, each new batch starts instantly.
- Keep the tab open until the batch finishes.
- Split very large folders into batches of 50.
- Close other heavy tabs if your device is low on memory.
Tips for bulk conversion
- Rename files first if you need a consistent naming scheme; the bulk rename tool can help.
- Convert to WebP for websites and JPEG for sharing with people.
- Use the bulk compressor afterwards if you also need to cap dimensions.
- Check one converted file before deleting originals.
Bulk image converter FAQ
How many images can I convert at once?
Up to 50 per batch, each up to 100 MB.
Can I mix different input formats?
Yes. Each file is decoded according to its own format and converted to the one target you choose.
Are file names kept?
Yes. Only the extension changes to match the new format.
What happens to animated GIFs?
They are converted using the first frame, since JPEG, PNG and WebP output here is a still image.
Does it support HEIC?
Yes. HEIC photos are decoded in your browser and converted like any other image.
Is anything uploaded?
No. Every conversion runs locally in your browser.