Image Converter – Convert JPG PNG WebP Online Free
Image Converter is a free online tool that converts images between JPG, PNG, WebP, and BMP formats using the HTML5 Canvas API — entirely in your browser. Batch-convert up to 5 images at once, adjust quality per image, and download individually or all together. No files are uploaded to any server.
Your files never leave your device. All conversion happens locally using the Canvas API. No upload, no server, no storage.
How to Convert Images Online Free
- 01
Upload up to 5 images
Drag and drop or click to add JPG, PNG, WebP, GIF, or BMP files. Up to 5 images can be converted in one session.
- 02
Choose target format and quality
Select JPG, PNG, or WebP for each image. Adjust the quality slider for JPG and WebP output (default 90).
- 03
Convert and download
Click "Convert" per image or "Convert All" for the batch. Download individually or all at once when conversion is complete.
Features
- ✓Convert JPG, PNG, WebP, GIF and BMP
- ✓Batch convert up to 5 images at once
- ✓Adjustable quality slider (JPG and WebP)
- ✓Per-image format selector
- ✓Before/after file size display
- ✓Individual and bulk download
- ✓100% client-side — files never leave your device
- ✓No login, no file upload, no sign-up
Frequently Asked Questions
How does browser-based image format conversion work?
Each image is drawn onto an HTML5 Canvas element and then exported to the target format using the Canvas toBlob() API. This approach supports JPG, PNG, WebP, and BMP output entirely in the browser — no file is ever sent to a server.
Will converting to PNG increase file size?
PNG is a lossless format, so it preserves every pixel and tends to produce larger files than JPG or WebP — especially for photographs. Use PNG when you need a transparent background or pixel-perfect quality. Use JPG or WebP for photos where file size matters.
Does converting JPG to PNG improve quality?
No. Converting a JPEG to PNG will not recover quality lost during the original JPEG compression — the artefacts are already baked in. The benefit of converting is gaining support for transparency (PNG alpha channel), not improved visual quality.
What happens to transparency when converting to JPG?
JPEG does not support transparency. When converting a PNG or WebP with a transparent background to JPG, the transparent areas are filled with white. If you need to preserve transparency, output to PNG or WebP instead.
Can I convert GIF files?
Yes — GIF files can be uploaded. Note that only the first frame of an animated GIF is converted, since the Canvas API treats it as a static image. The tool is not suitable for converting animated GIFs frame-by-frame.