Free Online Image Converter

Convert images between PNG, JPEG, GIF, WebP, AVIF, BMP, ICO and TIFF, in any direction, without installing anything and without uploading a single byte. Transparency is kept wherever the target format can hold it, and gradients are preserved at full colour depth.

Everything runs inside your browser, so your images never leave your computer.

Instructions

How to convert images

Drop your files onto the area above or click it to pick them. Each one is decoded straight away, so the list shows you its real size and whether it has any transparency before you convert anything. Choose the output format, press Convert, and download each result — or all of them at once as a ZIP.

Files are decoded once and kept. Changing the format and converting again re-encodes what is already in memory instead of reading the files a second time, which is what makes trying three formats on twenty images practical.

Transparency

PNG, WebP, AVIF, TIFF, BMP and ICO all carry a full alpha channel, and the tool preserves it — a logo with a clear background stays clear. JPEG has no alpha at all, so converting to it fills every transparent area with the colour you choose; the tool warns you before it does. GIF is the odd one: it carries exactly one bit of transparency, so a pixel is either solid or invisible and soft edges become hard ones.

Gradients and colour

Every conversion goes through full 8-bit-per-channel colour, so a gradient survives untouched into PNG, WebP, AVIF, TIFF and BMP. GIF is the exception, and unavoidably so: the format holds 256 colours at most, which turns a smooth sky into a handful of flat bands. The "Dither gradients" option scatters those band edges into a fine texture the eye reads as a gradient again — worth leaving on for photographs, worth turning off for flat artwork and screenshots, where it just adds noise.

Windows icons

An .ico is not one picture but a bundle of square ones, and Windows picks whichever size it needs. Choose the sizes you want and the tool renders each of them, fitting your image inside the square rather than cropping it, with transparent padding where the shape does not match. 16, 32, 48 and 256 covers the taskbar, the desktop and the file dialog.

What your browser can and cannot do

PNG, JPEG and WebP are read and written by every current browser. TIFF is read and written here by a decoder bundled with the tool, since no browser handles it natively. GIF, BMP and ICO are written by encoders built into this page. AVIF depends on your browser: the tool tests it when the page loads and greys the option out if it is not available. Animated GIFs are converted from their first frame, and an SVG needs a width and height in the file for the browser to know how many pixels to draw.