// convert images between formats — nothing uploaded
Free browser-based image converter. Convert images between JPEG, PNG, WebP, BMP, and ICO formats in batch. Adjust quality, no upload to server, no sign-up required.
Click or drag & drop images
Any image format — max 20 filesNo images yet
Upload up to 20 images at onceDrag and drop or click to select up to 20 images in any format — JPEG, PNG, WebP, GIF, BMP, and more.
Select the output format, adjust quality, set a background color for transparent images, and optionally resize.
Click Convert All, then download files individually or grab them all as a ZIP archive.
A free browser-based image format converter using the HTML Canvas API. Convert any image to JPEG, PNG, WebP, BMP, or ICO — with quality control, background fill for transparency, optional resizing, batch processing of up to 20 files, and ZIP download. Nothing is uploaded to a server.
No. All conversion happens in your browser using the HTML Canvas API. Your images never leave your device — no data is sent to any server. This makes the tool safe for confidential, personal, or proprietary images.
JPEG does not support transparency — it has no alpha channel. When you convert a PNG or WebP image that contains transparent areas to JPEG, those areas must be filled with a solid color. The default is white, which works for most images on white-background websites. Use black for dark-themed designs. The fill only affects pixels that were transparent in the source image.
Upload your PNG logo or icon, select ICO as the target format, and optionally set the max dimension to 256px (the maximum standard ICO size). Click Convert, then download the result. The ICO file produced contains a single 32-bit RGBA frame. For multi-size ICO files (16px + 32px + 48px + 256px), a dedicated favicon generator tool is recommended.
Both are lossy formats for photographs, but WebP typically produces files 25–35% smaller than JPEG at equivalent visual quality. WebP also supports transparency (like PNG) and animation (like GIF). WebP is supported in all modern browsers. JPEG is better for compatibility with older systems, print workflows, and email clients that may not render WebP.
The Canvas API reads only the first frame of an animated GIF. Converting an animated GIF will produce a static image of the first frame. For animated GIF conversion or optimization, a dedicated animated image tool is required.
BMP (Bitmap) is an uncompressed raster image format developed by Microsoft. BMP files are very large because they store every pixel without compression. They are rarely used on the web but remain relevant for Windows system dialogs, legacy software, and certain CAD or industrial tools that require uncompressed bitmap input. Converting to BMP is almost always larger than the source file.
Different image formats serve different purposes. JPEG is the standard for photographs on the web and in print. PNG preserves transparency and is lossless — ideal for logos, icons, and screenshots. WebP is the modern web standard, combining smaller file sizes with both lossy and lossless compression and transparency support. BMP is an uncompressed format used in legacy and Windows contexts. ICO is the format required for browser favicons.
Converting between these formats is a common workflow task: converting PNGs to WebP for web performance, converting WebP downloads to JPEG for email attachments, or converting a logo PNG to ICO for a favicon. This tool handles all of these cases in your browser, instantly, with no server required.
Switching from PNG to WebP is one of the easiest performance wins for a website. WebP supports both lossy and lossless compression, and its lossless mode produces files typically 26% smaller than PNG. Its lossy mode at quality 85 is nearly indistinguishable from a high-quality PNG but often 3–5× smaller. All major browsers have supported WebP since 2020, and Google's Core Web Vitals scoring rewards smaller image payloads.
Transparency support varies by format. PNG and WebP both support full alpha transparency. JPEG and BMP do not support transparency at all. ICO supports transparency (32-bit RGBA). When converting from a format that supports transparency (PNG, WebP, GIF) to one that does not (JPEG, BMP), the transparent areas must be filled with a solid color. This tool lets you choose that fill color — white is the default and works for most cases.
When converting in the opposite direction — from JPEG to PNG or WebP — no transparency is added. The image remains fully opaque. To create transparency in a JPEG image, you would need a photo editing tool to manually cut out the background.
Favicons must be in ICO format for maximum compatibility — especially with older versions of Internet Explorer and Windows desktop shortcuts. Modern browsers also accept PNG favicons specified in the <link> tag, but ICO remains the standard for the root favicon.ico file. To create an ICO from this tool: upload a square PNG logo (ideally 256×256 or 512×512), select ICO format, and set max dimension to 256px if needed. The result is a standard 32-bit ICO file.