About Image Format Converter
Image Format Converter is a free online tool that converts images between PNG, JPEG, WebP, AVIF, and BMP formats entirely in your browser using the HTML5 Canvas API. You can also convert SVG code directly to any raster format by pasting the SVG markup. No files are ever uploaded to a server — everything is processed locally on your device, ensuring complete privacy. The tool supports quality control for lossy formats, custom background colors for transparency handling, scaling, and custom dimension output.
How to Use
- Upload an image file (PNG, JPEG, WebP, GIF, BMP, SVG) by dragging it into the drop zone or clicking to browse, or switch to the SVG Text tab and paste SVG code directly.
- Select the target output format: PNG, JPEG, WebP, AVIF, or BMP.
- Adjust the quality slider for lossy formats (JPEG, WebP, AVIF) — lower values produce smaller files.
- Optionally set a background color (important when converting transparent PNGs to JPEG).
- Choose a scale factor or enter custom dimensions if you need to resize during conversion.
- Click "Convert Image" and compare the original and converted images side by side.
- Click "Download Converted Image" to save the result to your device.
When to Use Which Format
PNG is ideal for images that require transparency, screenshots, and graphics with sharp edges or text — it uses lossless compression so quality is never degraded. JPEG is best for photographs and complex images where small file size matters more than pixel-perfect quality. WebP provides the best balance of quality and file size for web use — it supports both lossy and lossless compression and transparency, and is supported by all modern browsers. AVIF offers even better compression than WebP but browser support is still expanding. BMP is uncompressed and useful when you need raw bitmap data for legacy software or specific workflows.
Raster vs vector — convert with intent
Before choosing a target format, know which family you’re in. Raster formats (PNG, JPEG, WebP, AVIF, BMP) store a grid of pixels — fixed resolution, great for photos, pixelated when enlarged past their native size. Vector (SVG) stores math — infinitely scalable, perfect for logos and icons. Converting SVG → raster (e.g. to make a PNG icon) is a one-way street that loses scalability, so only do it when you specifically need a fixed-size bitmap. This converter handles both directions, including SVG → raster at any scale you specify.
The transparency-flattening trap
The most common surprise: convert a transparent PNG to JPEG and the transparent areas turn solid (usually black or white), because JPEG has no alpha channel. If you need transparency preserved, target PNG, WebP, or AVIF instead. When you must go to JPEG, this tool lets you pick the background fill color the transparency flattens onto — choose one that matches where the image will sit rather than accepting a default black box.
WebP vs AVIF in one line
Both beat the old formats; they differ in maturity:
| Format | Size vs JPEG | Support |
|---|
| WebP | ~25–35% smaller | Universal (all modern browsers) |
| AVIF | ~50% smaller | Modern browsers; encoding narrower |
Use WebP as the safe, smaller-than-JPEG default; use AVIF when minimum file size justifies the tighter support window.
SVG to high-res raster
Because SVG is vector, you can rasterize it at any resolution — use the scale option (2×, 3×) to render crisp high-DPI icons, social images, or print assets from a single source. One caveat: SVG <text> depends on the font being available at conversion time, so convert text to paths in your SVG editor first if you want guaranteed rendering. All conversion runs locally via Canvas — images never upload.
