Image Tools

Bulk Image Converter

Converts up to 100 images to PNG, JPEG, WebP or AVIF in one go, with a quality slider for the lossy formats. Several converted files are delivered as a ZIP.

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Process

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Processed in your browser — your file is not uploaded.

Drop your files here

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Up to 100 files

Output Format

💡 Batch Processing

Upload up to 100 images — all are converted to PNG and delivered together as a ZIP. One image uploaded downloads directly.

How to Use

1Add up to 100 images by dropping them on the upload area or choosing them from your device.
2Under 'Output Format', pick PNG, JPEG, WEBP or AVIF.
3For JPEG, WEBP or AVIF, set the Quality slider (50% to 100%, default 92%).
4Click the 'Convert to ...' button, which shows your chosen format.
5Download the converted file, or the ZIP if you added more than one image.

About this tool

Updated October 5, 2026

Picking the output format

JPEG for photographs that must open anywhere, PNG for graphics and transparency, WebP for your own website, AVIF for the smallest files where support allows.

The choice decides far more than the file extension. JPEG and WebP and AVIF are lossy, so converting into them costs a little detail; PNG is lossless, so converting into it never loses anything but usually produces a much larger file. Converting a folder of photographs to PNG is the most common mistake here — it multiplies the size with no visible benefit, because photographic detail is exactly what lossy compression handles well.

Transparency survives only in some formats

PNG, WebP and AVIF keep an alpha channel. JPEG cannot, so transparent areas become white.

If your batch mixes logos with photos and you convert everything to JPEG, the logos come back on white rectangles. That is invisible on a white page and obvious anywhere else. Sort the batch first: convert the photographs to JPEG or WebP, and keep anything with a see-through background in PNG or WebP. It takes a moment and avoids redoing the whole run. One more naming detail: if two files would produce the same output name, such as logo.png and logo.jpg both becoming logo.webp, the second is numbered logo-2.webp so nothing is lost.

Converting does not undo earlier compression

Whatever detail a file already lost stays lost. Converting changes the container, not the content.

A blocky JPEG converted to PNG is a lossless copy of a blocky image, in a larger file. Converting back and forth between lossy formats compounds the damage each time, so convert once, from the best original you have. Where a batch has already been through several hands, the honest answer is that the ceiling is set by whatever arrived, not by the format you choose now.

Where the files are refused

Every current browser shows WebP and AVIF, but plenty of desktop software, upload forms and older devices still reject them.

That split decides the format more often than quality does. For images going onto a site you control, WebP is an easy win and AVIF is smaller still. For anything you are sending to someone else, or uploading to a form, JPEG and PNG remain the formats nothing refuses. When in doubt, convert to JPEG and keep the originals.

Batch Process Images in Your Browser, No Desktop Software
When a whole folder needs the same resize, compression, conversion or watermark, a browser batch tool can do it. Here is how to plan a batch, its memory limits, and where desktop software still wins.

Features

Up to 100 images per run
Four output formats: PNG, JPEG, WebP and AVIF
Quality slider (50%-100%) shown only for the lossy formats
Each output file keeps the original name with the new extension
One image downloads directly; several are packed in a ZIP
Runs in your browser; the images are not uploaded

FAQ

Will AVIF and WebP always work?

Only if your browser can encode them. WebP works in current Chromium-based browsers and Firefox, while Safari may not produce it. AVIF encoding is unavailable in many browsers. If the browser returns a different format than the one requested, the tool reports an error rather than silently giving you the wrong type.

What happens to transparency when I convert to JPEG?

JPEG has no transparency, so any transparent pixels cannot be kept in a JPEG. Choose PNG or WebP if you need to preserve transparent areas.

Can it convert HEIC photos?

It accepts any file your browser can open as an image. If a HEIC/HEIF file is not natively supported, use the dedicated HEIC to JPG tool, which loads a decoder for that format.

Is converting to JPEG or WebP reversible?

No. Lossy formats discard detail, and converting back to PNG will not restore it. Keep your originals.

Image Converter

Convert an image to PNG, JPEG or WebP, with a quality slider for lossy formats.

HEIC to JPG

Convert one HEIC or HEIF photo to a JPG file in your browser.

Bulk Image Compressor

Compress up to 100 images with one quality slider in your browser; multiple files come back as a ZIP.