Convert Images Between JPG, PNG, and WEBP in Your Browser

You've got a PNG screenshot that needs to become a JPG for an upload form that rejects PNGs, or a WEBP image from a website that your older software refuses to open, and now you need a format converter that doesn't involve installing anything or signing up just to swap a file extension's underlying encoding.

Why Converting Image Formats Doesn't Need a Server

Format conversion is a pure computation: decode the pixels from one encoding, re-encode them into another. There's nothing about this process that actually requires a remote server, yet most "convert image" websites still route your file through one anyway, adding an upload delay and putting a copy of your file somewhere outside your control for no real benefit. Browsers already have native image decoding and encoding capabilities built in, which means the whole conversion can happen locally using your device's own processing, with results appearing almost instantly and nothing ever leaving your machine.

This also matters for images that contain sensitive content, like a scanned ID converted from PNG to JPG for a form, or a screenshot of private information that needs reformatting before sharing. Keeping that conversion local avoids creating an unnecessary copy on a third party's infrastructure.

How to Convert an Image with ihatetools

1. Open Convert Image Format.
2. Upload the image you want to convert.
3. Choose your target format: JPG, PNG, WEBP, or whichever option fits what you need.
4. Adjust quality settings if the target format supports lossy compression (JPG and WEBP do; PNG does not).
5. Download the converted file, now saved with the new format and extension.
6. If the converted image is still too large for where it's going, follow up with the Image Compressor to shrink it further.

Choosing the Right Format

• JPG is best for photographs and complex images with lots of color gradients. It compresses well but doesn't support transparency.
• PNG is best for screenshots, logos, and graphics with sharp edges, flat colors, or transparent backgrounds. It's lossless, so quality never degrades, but file sizes are larger for photographic content.
• WEBP generally gives you the smallest file size for a given visual quality, and supports both lossy and lossless modes plus transparency, making it a strong default for modern websites.
• Converting a PNG with transparency to JPG will fill the transparent areas with a solid background color (usually white), since JPG doesn't support an alpha channel. Keep this in mind if your image has a transparent logo or cutout.
• Round-tripping between lossy formats loses quality each time. Converting JPG to WEBP and back to JPG repeatedly compounds compression artifacts. Keep an original lossless copy if you expect to need multiple format changes down the line.
• Check how the destination platform actually handles the format. Some older systems or templates still don't accept WEBP uploads, so when in doubt, JPG remains the safest universally-supported choice.

Troubleshooting Common Conversion Issues

• Converted JPG has a black or white background where the image used to be transparent. This is expected behavior, not a bug. JPG has no concept of transparency, so the converter fills transparent pixels with a solid color. If you need to keep transparency, convert to PNG or WEBP instead.
• The converted file looks larger than the original, not smaller. Converting a JPG to PNG often increases file size, since PNG is lossless and doesn't compress photographic detail as efficiently as JPG's lossy algorithm. If you need both a lossless format and a small file, WEBP's lossless mode is usually a better middle ground than PNG.
• Colors look slightly different after conversion. Some image formats handle color profiles differently. If you're working with a photo edited in a color-managed workflow, a lossy re-encode can introduce small shifts, usually invisible unless you're doing precise color matching work.
• Animated GIFs lose their animation after conversion. Converting a GIF to JPG or PNG keeps only a single frame, since those formats don't support animation. If you need to keep the motion, convert to an animated WEBP instead, or keep the file as a GIF.

Format Conversion vs. Compression

These two tools solve different problems, though people sometimes reach for one when they mean the other. Converting formats changes how pixel data is encoded; it may incidentally shrink a file (JPG is usually smaller than PNG for the same photo) but that's a side effect, not the goal. If your actual goal is a smaller file in the same format, like a JPG that's still too big to email, the Image Compressor targets that directly without changing the file type. Many workflows use both: convert to the right format first, then compress to hit a specific size target.

Can I convert HEIC photos from my iPhone with this tool?

For HEIC files specifically, use the dedicated HEIC to JPG converter, which is built to handle Apple's HEIC format and its quirks directly.

Does converting from PNG to JPG reduce image quality?

It can, since JPG uses lossy compression by default. At a high quality setting the difference is usually unnoticeable, but at lower settings you may see some softening, especially around sharp text or edges.

Will converting the format change the image dimensions?

No, format conversion only changes how the pixel data is encoded and stored. If you also want to resize the image, use Image Resizer as a separate step.

Is there a limit to how many images I can convert?

No artificial limit exists since nothing is uploaded to a server; you can convert as many images, one after another, as your device can comfortably handle.

Convert Your Images Instantly

Swapping file formats shouldn't require software installs or server uploads. Use Convert Image Format on ihatetools to get exactly the file type you need in seconds.