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Bulk Image Converter

This bulk image converter changes a whole batch of images to one format in your browser. Mix sources freely: JPG, PNG, WebP, AVIF, GIF, BMP, ICO, SVG, TIFF and HEIC photos from iPhones all go into the same queue. Convert to JPG, PNG, WebP, AVIF, GIF, BMP or TIFF, set the quality once, and download everything as a single ZIP. In the same pass you can limit the longest side, set a size limit in KB, reduce colours for smaller PNGs, pick a background for transparent areas, keep or strip EXIF, and rename the files with a pattern. Web teams use it to batch convert images to WebP or AVIF before a launch, and iPhone users use it to turn HEIC photos into JPG.

Always freeNo sign upRuns in your browser

Accepts JPG, PNG, WebP, AVIF, GIF (first frame), BMP, ICO, SVG, TIFF and HEIC/HEIF from iPhones.

Bulk supported. Add several files and they are processed in a queue with one ZIP download. The same settings apply to every file, and nothing leaves your device.

How to use

01

Add the images

Drop files or a whole folder, paste with Ctrl+V or import an image URL. HEIC and TIFF files are decoded in your browser, so they take a moment longer than JPG or PNG.

02

Pick the output

Choose the format under Convert to, then a quality for JPG, WebP and AVIF or a colour count for PNG and GIF. Optionally set a longest side, a KB limit and a file name pattern.

03

Convert and download

Click the convert button, for example Convert to WebP, and watch each file finish with its new size. Then click Download all (ZIP) to save converted-webp.zip.

Why Bulk Image Converter

Which format to convert to

The right target depends on what the images show and where they are going. For a website, WebP is a sensible default because it handles both photos and graphics with transparency at small file sizes, and AVIF goes smaller still where it is supported.

If the same images also need to work in email or be sent to a print shop, make a second JPG copy of the set. Converting is quick, so keeping one set for the web and one JPG set for everything else costs little.

TargetUse it forWatch out for
JPGPhotos for email, print services and older appsNo transparency; transparent areas get the background colour
PNGLogos, icons, screenshots with sharp text, anything needing exact pixelsLarge files for photos; reduce colours to shrink graphics
WebPWebsite images, both photos and graphics, with transparencySome older desktop software cannot open it
AVIFWebsites that want the smallest photosSlower to save; some older apps and browsers cannot open it
GIFSimple graphics for old systems256 colours at most, so photos look grainy
TIFF or BMPPrint, scanning and archive workflowsVery large files; not for websites

Common questions

What happens to PNG transparency when I batch convert to JPG?
JPG has no transparency, so transparent areas are filled with the background colour you pick, white by default. Logos and cutouts end up on that solid colour. If you need transparency, convert to WebP, AVIF or PNG instead.
Can I batch convert HEIC photos to JPG?
Yes. Drop the HEIC or HEIF files into the queue, pick JPG and convert. The decoder runs in your browser, so the photos are not uploaded. For burst or multi-image HEIC files, one image per file is converted.
Which input formats does the bulk image converter accept?
JPG, PNG, WebP, GIF, BMP, ICO and SVG open in every current browser. TIFF and HEIC are decoded by the tool itself, and AVIF works in browsers that can display it. Animated GIFs are converted from their first frame. Camera RAW files are not supported.
Can I convert images to AVIF in bulk?
Yes, where your browser can save AVIF, such as current Chrome and Edge. If it cannot, the AVIF option is greyed out and a note suggests WebP, which gives similar savings and opens almost everywhere.
How should I set quality when I batch convert PNG to WebP?
The 92 default is a safe start for photos and screenshots alike. Go down to about 80 for photos if you need smaller files, but keep screenshots with small text at 90 or above, since blur shows up around sharp edges first.
Can I resize images while converting them in bulk?
Yes. Under Resize while converting, pick a longest side from 800 to 3840 px. Larger images are scaled down with their proportions kept, and smaller ones are left at their size.
Will duplicate file names collide after a bulk format conversion?
No. If photo.png and photo.jpg would both become photo.webp, the second one is saved as photo-2.webp, so nothing is overwritten inside the ZIP.
Does bulk image conversion keep EXIF data such as date and GPS?
Only if you ask. EXIF is removed by default, which is useful for privacy before sharing photos. Switch on Keep EXIF data to copy the camera, date and GPS details into JPG, PNG and WebP output.
Can I rename files while converting images in bulk?
Yes. The File names pattern keeps the original name with {name} and adds a counter with {n} or a run of x, the size with {w} and {h}, or today's date with {date}. For example, product-{n} gives product-001.webp, product-002.webp and so on.
Are images uploaded when I convert them in bulk?
No. Decoding, converting and building the ZIP all happen in your browser. Your files never leave your device.

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