Convert Images Free — JPEG, PNG, WebP, AVIF in Your Browser
Convert images between JPEG, PNG, WebP, AVIF, GIF, BMP, and more — instantly in your browser. No uploads, no waiting, completely private.
The right image format can make a significant difference in file size, quality, and compatibility. SimpleTools Convert Image lets you convert between any major image format instantly, all inside your browser — no uploads, no accounts.
Why Image Format Conversion Matters
Different situations call for different formats:
- JPEG — photographs, the universal standard, small file sizes
- PNG — graphics, logos, anything needing transparency or lossless quality
- WebP — modern web format, 25–35% smaller than JPEG at similar quality
- AVIF — next-gen format, even smaller than WebP, growing browser support
- GIF — animated images, limited to 256 colours
- BMP — uncompressed bitmap, used in some Windows workflows
- TIFF — archival and print-quality format
Common conversion scenarios:
- Screenshot (PNG) → JPEG: Reduce a 2 MB screenshot to 150 KB for email
- JPEG → WebP: Modernise images for web delivery to improve page speed
- GIF → MP4: (handled by video tools) Convert animations to efficient video
- HEIC → JPEG: Make iPhone photos viewable on Windows/Android
The Privacy Case for Browser-Based Conversion
Images can contain sensitive information — documents, whiteboards, ID photos, designs under NDA. Uploading them to an online converter creates unnecessary exposure.
✅ Nothing is uploaded — conversion uses the browser’s built-in Canvas and codec APIs
✅ Works offline — convert images without an internet connection
✅ Batch conversion — convert multiple images in one go
✅ No watermarks — the converted image is clean and ready to use
✅ No file size restrictions from server quotas
How It Works
Image conversion in the browser uses the Canvas API:
- The source image is loaded into an
<img>element - The image is drawn onto an offscreen Canvas
canvas.toBlob('image/webp', quality)(orimage/jpeg,image/png, etc.) exports the canvas in the target format- The resulting Blob is converted to a download link — all in memory, in your browser tab
AVIF conversion may use a WebAssembly encoder if the browser’s native encoder doesn’t support it yet.
How to Use the Image Converter
- Visit simpletools.one/convert-image
- Click Choose Images or drag and drop your files
- Select the output format from the dropdown
- For JPEG and WebP, adjust the quality slider
- Click Convert
- Download individual files or use Download All for batch output
Format Selection Guide
| Source | Recommended Target | Reason |
|---|---|---|
| iPhone HEIC | JPEG | Universal compatibility |
| PNG (photo) | JPEG or WebP | Dramatic size reduction |
| JPEG (web) | WebP | Modern web performance |
| PNG (logo) | PNG or WebP | Preserve transparency |
| BMP | PNG or JPEG | Compressed without quality loss |
| GIF (static) | PNG | Better compression, still lossless |
Who Is This For?
- Web developers converting images to modern formats like WebP or AVIF
- Graphic designers converting between formats for different output needs
- Photographers batch-converting camera RAW exports to JPEG for sharing
- Content creators preparing images for different platforms with format requirements
- IT admins batch-converting legacy image archives to modern formats
Convert your images at simpletools.one/convert-image — free, instant, and no uploads ever.