Image Converter

This is a general image and photo converter that works inside your browser: drop images in almost any common format and get them back as JPG, PNG, WebP or ICO. It is for anyone with a mixed folder — iPhone HEIC photos, WebP and AVIF images saved from websites, an old BMP, an SVG logo — who needs them in one format that their software, website or upload form accepts, without uploading them anywhere.

Inputs it reads: JPG, PNG, WebP, HEIC/HEIF, AVIF, GIF, BMP, SVG and ICO. The format is identified from each file's first bytes, not its name, so a WebP saved as photo.jpg is handled as the WebP it really is. Then each file takes the right decoding route. Most formats are decoded by your browser's built-in decoders. HEIC is not readable by Chrome, Edge or Firefox, so HEIC photos are decoded with a bundled copy of libheif (about 1.3 MB, loaded only the first time you convert a HEIC); a HEIC holding several images produces one output per image. SVG is drawn at its own width and height, scaled down with the same proportions if it declares more than a browser canvas can hold (16,384 px per side or 100 megapixels). TIFF is refused with an explanation, because only Safari can decode TIFF, and a PDF is pointed to the PDF to JPG and PDF to PNG tools.

Outputs: JPG is the most compatible and small, but lossy and without transparency — transparent areas are filled with a colour you choose (white by default). PNG is lossless and keeps transparency, at a larger file size. WebP is lossy at the quality you set, keeps transparency, and is usually smaller than JPG; current browsers display it, but some older software does not open it. ICO writes a Windows/browser icon file containing 16, 32 and 48 px versions, the image fitted inside a square with transparent padding. Quality runs from 1 to 100 (90 by default) for JPG and WebP.

The page tells you what each conversion loses. An animated GIF, WebP, PNG (APNG) or AVIF is converted as its first frame only. EXIF data — date, camera, GPS location — is not copied into the output, and colour profiles are not carried over, so images are written as standard 8-bit sRGB. Converting a JPG to JPG re-encodes it at the chosen quality, which can shrink it but costs a little detail each time. An ICO input holds several sizes, and your browser decodes one of them; the result's pixel size shows which.

When you need more control, the specialised converters go further: HEIC to JPG for iPhone photos, AVIF to PNG and AVIF to JPG, GIF to PNG to extract every frame of an animation, SVG to PNG to render a vector at 2× or 4×, PNG to ICO to choose icon sizes, and Image Resizer or Image Compressor to change dimensions or file size.

Every step runs on your device: files are read into the tab's memory, converted with a canvas, and offered back as downloads. You can confirm in your browser's developer tools (Network tab) that no request carries your images. Up to 50 files per batch, each up to 50 MB (40 MB for HEIC).

1. Each file must be at most 50 MB (40 MB for HEIC). Its format is read from its first bytes; TIFF and PDF get their own explanation, and anything else that is not JPG, PNG, WebP, HEIC, AVIF, GIF, BMP, SVG or ICO is refused with a message naming what it is. 2. Decoding route: HEIC through libheif (every image in the file); SVG rendered at its own width × height (300 × 150 px if it declares neither size nor viewBox; scaled down, same proportions, if over 16,384 px per side or 100 megapixels — a 20000 × 10000 SVG becomes 14142 × 7071); everything else through the browser's decoder (createImageBitmap). Animated GIF, WebP, APNG and AVIF files are flagged: only the first frame is used. 3. The image is drawn onto a canvas at its full size. For JPG, the canvas is filled with the background colour first, because JPG has no transparency. 4. JPG and WebP are encoded with canvas.toBlob at quality ÷ 100 (default 90); PNG losslessly. ICO: the image is scaled to fit 16, 32 and 48 px squares with transparent padding, each saved as PNG and packed into one .ico file. 5. The output keeps the original name with the new extension; a multi-image HEIC gives name-image-1, name-image-2…, and duplicate names in a batch get (2), (3). Download each, or all as a ZIP.