Free online image converter

Convert between any image format instantly. JPG, PNG, WebP, AVIF, HEIC, BMP, SVG, TIFF, GIF — all processed in your browser.

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Supports all major image formats

Image Converter — Free, Fast & Private

Need to convert an image from one format to another? MiniPx handles all major formats in your browser — no upload, no server, no waiting. Whether you need to convert a PNG screenshot to a smaller JPG, turn a WebP image into a universally compatible format, or convert iPhone HEIC photos to something you can actually share, it all happens instantly on your device.

The most common conversions are PNG to JPG (for smaller file sizes), JPG to WebP (for faster websites), and HEIC to JPG (for sharing iPhone photos). MiniPx also handles less common formats like BMP, TIFF, and SVG rasterization — all without installing any software.

Unlike cloud-based converters, MiniPx never touches your files. Your images stay on your device throughout the entire conversion process. This makes it safe for converting sensitive documents, personal photos, and ID images.

Every conversion preserves as much quality as the target format allows. When converting to lossy formats like JPG, you can control the compression level. When converting to lossless formats like PNG, you get pixel-perfect output.

MiniPx supports batch conversion — add multiple images and convert them all at once. Each file is processed independently so you can mix input formats in a single batch.

How it works

Upload your image: Add any image in JPG, PNG, WebP, AVIF, BMP, HEIC, TIFF, GIF, or SVG format.
Choose output format: Select your target format from the format dropdown. JPG for photos, PNG for graphics with transparency, WebP for web use.
Adjust quality if needed: For lossy formats like JPG and WebP, choose a compression level. Smart preset balances size and quality.
Download converted image: Click download to save your converted image. Batch mode lets you convert and download multiple files at once.

Frequently asked questions

Which image formats can MiniPx convert?

MiniPx converts between JPG, PNG, WebP, AVIF, BMP, SVG, TIFF, GIF, and HEIC. Not all browser-to-browser conversions are supported for every pair, but all common conversions work reliably.

Does converting images reduce quality?

Converting to a lossy format (JPG, WebP) involves some quality trade-off, which you control with the compression slider. Converting to lossless formats (PNG) preserves exact quality. Converting between lossy formats (JPG to WebP) does involve a generation loss.

Is it safe to convert sensitive images here?

Yes. MiniPx processes everything in your browser. Your images are never uploaded to any server. This is the safest way to convert personal photos, ID documents, and confidential images.

Can I convert multiple images at once?

Yes. Add all your images and MiniPx converts them in batch. You can mix different input formats — each file is processed independently.

What is the best format for web images?

WebP offers the best balance of quality and file size for web use. It produces files 25-35% smaller than JPG at the same visual quality. Use PNG only when you need transparency or pixel-perfect graphics.

How do I convert HEIC photos from my iPhone?

Upload your HEIC files to MiniPx and select JPG or PNG as the output format. The conversion happens instantly in your browser — no app installation needed.