Image Format Converter

How to use

1. 1Pick the output format: PNG for lossless and transparency, JPG for the smallest photos, or WebP for modern web pages.
2. 2Drag the quality slider for JPG or WebP output. 75 to 90 is a good range for most photos. PNG output is always lossless.
3. 3If you are converting to JPG (or you turn on Flatten transparency), pick a background color for transparent areas.
4. 4Drop your images onto the upload area or click to browse. Each result shows the format change, file size change, and dimensions, with a one-click download.
5. 5Use Re-encode all to apply a new format or quality to the loaded images, or Download all to save every converted file at once.

About this tool

Image Format Converter changes a PNG, JPG, WebP, GIF, or BMP into a PNG, JPG, or WebP entirely in your browser. Drop one or many images, pick the output format, drag the quality slider for lossy formats, and download the converted files with one click. The tool decodes each image with the browser's native image pipeline (an Image element loaded from a local object URL), draws it into an HTMLCanvasElement, and re-encodes it with canvas.toBlob, which is exactly how Chrome, Safari, Firefox, and Edge implement native format conversion. Pick PNG when you need lossless output and full transparency (best for screenshots, logos, illustrations, and UI assets), JPG when you need the smallest size for photographs or you are uploading to a system that does not accept PNG or WebP, or WebP when you want the modern web format that is typically 25 to 35 percent smaller than JPG at the same visual quality and still keeps transparency. The quality slider goes from 20 to 100 and applies to JPG and WebP output, where 75 to 90 is a good range for most photos. Because JPG cannot store transparency, the tool fills transparent pixels with a solid background color before encoding to JPG: white by default, with quick presets for black, light gray, and dark gray, plus a custom color picker for matching a brand background. PNG and WebP keep transparency by default, but a Flatten transparency toggle lets you fill the background even when the format would have allowed alpha, which is useful when you need a flat thumbnail or you want consistent output across formats. Each converted image shows the source format, the output format, the original and new file size, the percent saved (or grown, with a clear warning when the chosen settings produce a larger file), and the pixel dimensions. A Re-encode all button lets you change the format, quality, or background and refresh every loaded image without re-uploading. Batch download grabs every result at once. Conversion runs entirely in your browser, so your photos, screenshots, product images, design comps, and client assets never leave your device. That makes the tool safe for unreleased designs, internal screenshots, watermarked client work, medical or legal documents, and any image you would rather not upload to a third-party server. Useful for converting heavy PNG screenshots to lightweight JPG or WebP for blog posts and marketing pages, getting a transparent logo into a JPG-only CMS by flattening to a brand background, swapping a JPG photo to PNG when a design tool refuses anything else, dropping a folder of WebP downloads back to PNG or JPG for compatibility with older software, and any place a different image extension is the only thing standing between you and a working file. The tool only encodes formats the browser supports through canvas.toBlob (PNG, JPG, WebP); it does not write AVIF, HEIC, ICO, TIFF, or SVG. For input, the browser handles every image type it can natively decode, which on modern Chrome, Edge, and Safari includes AVIF and (on Safari) HEIC, in addition to PNG, JPG, WebP, GIF (first frame only), and BMP.

Free to use. Works in your browser. No signup, no login.