Image Format Converter
Convert uploaded PNG to JPG or JPG to PNG using canvas
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Add this tool to your website or blog for free. Includes a small "Powered by ToolWard" bar. Pro users can remove branding.
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About Image Format Converter
Convert Between Image Formats - JPEG, PNG, WebP, BMP, and More
Different platforms, applications, and workflows demand different image formats. Your website needs WebP for fast loading. Your print shop requires TIFF or high-quality JPEG. Your email signature works best as PNG with transparency. The Image Format Converter on ToolWard handles all of these conversions in your browser - upload in one format, download in another, with full control over quality settings.
Supported Formats
The tool supports conversion between the most widely used image formats: JPEG (the universal photograph format), PNG (lossless compression with transparency support), WebP (Google's modern format offering smaller files at equivalent quality), BMP (uncompressed bitmap), and GIF (limited to 256 colours, supports animation). Each format has its strengths, and the Image Format Converter lets you pick the right one for every situation.
When to Use Which Format
JPEG is best for photographs and complex images with many colours. It uses lossy compression, meaning file sizes are small but some quality is lost - usually imperceptible at higher quality settings. PNG is ideal for graphics, logos, screenshots, and any image that needs transparency. It uses lossless compression, so quality is perfect but files are larger. WebP combines the best of both - it supports lossy and lossless compression, handles transparency, and produces smaller files than JPEG or PNG at equivalent quality. If your audience uses modern browsers, WebP is almost always the best choice for web use.
How the Converter Works
Upload your source image. Select the target format from the dropdown. If converting to JPEG or WebP, adjust the quality slider - higher quality means larger files, lower quality means smaller files with visible compression artifacts. Click convert and your new image is ready to download. The tool uses the browser's built-in Canvas API for the conversion, which means it works offline, processes images locally, and handles files of any reasonable size.
Real-World Conversion Scenarios
A web developer receives a batch of product photos from a client in BMP format - massive files, completely impractical for a website. She runs them through the Image Format Converter, converting to WebP at 85 percent quality. File sizes drop from 5 megabytes each to under 200 kilobytes, with no visible quality loss. Page load times improve dramatically.
A graphic designer exports a logo with a transparent background as PNG, but the client needs a JPEG version for a Word document. Converting PNG to JPEG replaces the transparent areas with a white background - the converter handles this automatically. A blogger receives contributor photos in a mix of formats and converts everything to JPEG for consistency across the site.
Quality and File Size Trade-offs
For lossy formats like JPEG and WebP, quality settings between 75 and 85 percent typically offer the best balance of file size and visual quality. Below 70 percent, compression artifacts become noticeable - colour banding in gradients, blurring of fine details, and blocky artifacts in high-contrast areas. Above 90 percent, the quality improvement is minimal but the file size increase is significant. For most web use, 80 percent is the sweet spot.
The Image Format Converter is free, runs entirely in your browser, and never uploads your images to any server. Convert one image or an entire folder - there are no limits, no watermarks, and no account required.