Image Format Converter

Every image format has a purpose: JPG excels at compressing photographs with natural colors and gradients; PNG preserves transparency and is lossless for graphics; WebP delivers superior compression for web-delivered images; AVIF offers the best modern compression but has limited tooling support; SVG is infinitely scalable as a vector format but only works for illustrations. Choosing the wrong format wastes storage, breaks compatibility, or loses transparency. This converter handles the most common format conversions directly on your device, no cloud service required, and your images never leave your device.

How to use

1. Add your images. Drag one or more image files onto the drop zone or click to browse. Most common formats are accepted as input including JPG, PNG, WebP, AVIF, GIF, BMP, and TIFF.
2. Choose the output format. Select your target format from the dropdown. JPG and WebP offer lossy compression; PNG offers lossless compression. Choose based on your use case and the downstream platform's requirements.
3. Adjust quality if needed. For lossy formats (JPG, WebP), a quality slider lets you control the size-quality trade-off. For lossless formats (PNG), this setting has no effect.
4. Convert and download. Click Convert to process all uploaded files. Download them individually or use the Download All button to get all conversions in one step.

Tips for best results

• Use WebP for websites. If you're preparing images for a modern website, WebP produces 25–35% smaller files than JPG at the same quality. All major browsers support WebP. Use the image compressor for fine-tuned size control within a specific format.
• Use PNG for transparency. Any image that needs a transparent background must use PNG (or WebP with alpha). Converting such an image to JPG fills the transparent areas with white. Check whether your source image has transparency using the image info tool before converting.
• Convert SVG to PNG for web embeds. SVG is a vector format that can't be processed by raster image tools. Use the dedicated SVG to PNG converter to rasterize SVGs at a specific pixel size when you need a raster output.
• Convert HEIC before sharing. For iPhone photos in HEIC format, use the dedicated HEIC to JPG converter for reliable conversion, it uses a specialized decoder for the HEVC-based HEIC format.

Why use PixMidas

• 100% private. All conversion happens on your device using the Canvas API. No image file is ever uploaded to any server, this is especially important when converting personal, medical, or confidential images.
• Multiple output formats. JPG, PNG, WebP, AVIF, and BMP are all supported as output targets. Select the format that best matches your platform's requirements and your size-quality goals.
• No account needed. Free and instant, batch conversion with files processed locally on your device.

Frequently asked questions

Which format should I use for web images?

For photographs on modern websites, WebP is the best choice, smaller file sizes than JPG at the same visual quality, with native support in all major browsers since 2020. For older browser compatibility, JPG remains the universal fallback. For graphics with transparency (logos, icons, overlays), use WebP with alpha or PNG. For maximum next-generation compression where tooling support isn't a concern, AVIF offers the best results.

What happens to transparency when converting to JPG?

JPG does not support transparency. Any transparent pixels in the source image are filled with white (or the color the browser assigns as the background) during conversion. If your image needs to remain transparent, for placement over colored backgrounds or in design tools, convert to PNG or WebP instead, both of which support full alpha-channel transparency.

Is there any quality difference between PNG inputs and PNG outputs?

Converting between lossless formats (PNG to PNG) is lossless, no quality is lost. Converting a lossy format (JPG) to PNG produces a PNG that looks identical to the JPG, but the PNG cannot recover quality that was already lost when the JPG was originally encoded. Converting JPG to PNG does not "undegrade" the image, it simply changes the container without adding back any detail.

What is AVIF and should I use it?

AVIF (AV1 Image File Format) is the newest widely-supported image format. It offers the best compression of any standard format, typically 50% smaller than JPG and 20% smaller than WebP at comparable quality. It's supported in Chrome, Firefox, and Safari. The limitation is limited tooling support outside of browsers, many image editors, email clients, and desktop apps cannot display AVIF. Use it for web delivery where browser rendering is the only requirement.

Can I convert multiple images at once?

Yes. The converter supports batch uploads, drop multiple files at once and they are all converted to the same output format. Each converted file is available for individual download, or use Download All to save everything at once. All files are processed locally on your device.

Can I resize at the same time as converting?

The converter focuses on format conversion. If you also need to change dimensions, use the image resizer either before or after conversion. For most workflows, convert the format first, then resize, but the order doesn't affect final quality meaningfully for standard use cases.

What quality setting should I use for JPG output?

Quality 90 is the recommended default. It is visually identical to the source for the vast majority of photographs while keeping file size reasonable. Higher quality means a larger file with no perceptible visual improvement for most images. Quality 100 produces the largest file and is rarely needed. Quality 70 is the minimum available here; below that, compression artifacts typically become visible. If you need aggressive size reduction after converting, run the result through the image compressor for fine-grained control.