What is Batch Image Converter?

Batch Image Converter lets you convert dozens of images between formats in one go. Upload multiple files, pick a target format like PNG, JPEG, or WebP, and download them all as a ZIP archive.

Each file runs through an HTML canvas right on your device, so PNGs become JPEGs, JPEGs become WebP, GIFs become BMP — whatever combination you need. A quality slider controls how aggressively JPEG and WebP compress, and the ZIP wraps the lot for one tidy download instead of clicking save twenty times.

How to use

1. Upload multiple images by dragging them or clicking the upload area
2. Select the target format (PNG, JPEG, WebP, BMP, GIF, AVIF, or ICO)
3. Click Convert All and download the results as a ZIP file

When to use

• Compressing a folder of screenshots to WebP before uploading them to a CMS.
• Converting product photos from PNG to JPEG to shrink page weight on a storefront.
• Standardising mixed-format export from a phone camera into one consistent format.

Result

A web developer converts 50 PNG screenshots to WebP format to reduce page load times, downloading all converted images in a single ZIP.

FAQ

Why is my converted JPEG larger than the original PNG?

PNG handles flat colour and screenshots efficiently, while JPEG was designed for photographs. If the source has sharp text or solid blocks, JPEG can balloon. Try WebP at quality 80 instead — it usually beats both for that kind of content.

Does converting to a different format reduce image quality?

PNG, BMP and WebP at quality 100 are lossless. JPEG and lower-quality WebP discard detail to save bytes. Going PNG to JPEG is a one-way trip — converting back to PNG cannot recover the original pixels.

What's the limit on file count and file size?

Each file should stay under 20 MB. The total batch is bounded by your device's memory; a modern laptop handles 50 to 100 photos comfortably, while a phone may slow down past 30. If the ZIP step stalls, split the batch in half.

Will the output keep my filename and folder structure?

By default filenames are preserved with the new extension swapped in (sunset.png becomes sunset.webp). You can also add an optional prefix or suffix in the Rename field (so sunset.webp becomes web-sunset-sm.webp), which is handy when the output format matches the input and you want to avoid overwriting originals. Folder structure is flattened — every converted file lands at the root of the ZIP. Rename inside the archive if you need subfolders.

Does this strip EXIF metadata like GPS coordinates?

Yes. Canvas-based conversion discards EXIF, ICC profiles and most metadata as a side effect of re-encoding. That is handy for stripping location data from holiday photos, but if you need the EXIF preserved, this tool is not the right fit.

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