Convert Image Formats Without Uploading to Any Server
Convert between PNG, JPG, WebP, AVIF, and more formats entirely in your browser. Zero server uploads, complete privacy.
Drop a PNG image here or click to browse
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All processing happens in your browser. No files are uploaded.
brevtool Image Converter is a free, private image conversion tool that transforms between PNG, JPG, WebP, AVIF, and other formats — directly in your browser with no file uploads. Your photos and images are never transmitted to any server.
Why Uploading Images for Conversion Risks Your Privacy
Images carry far more data than what is visible on screen. EXIF metadata embedded in photos includes GPS coordinates, camera model, exact date and time, and sometimes even the photographer's name. When you upload an image to a server-based converter, all of this metadata — plus the image content itself — becomes accessible to the service provider.
A 2023 study by the University of Southern California found that 75% of online images retain original EXIF data including location information. Uploading vacation photos, product images, or personal pictures to conversion services inadvertently shares your location history and device information with third parties.
Browser-based image conversion uses the HTML5 Canvas API to decode and re-encode images entirely in your device's memory. No pixels, no metadata, and no file contents are ever sent over the network. This approach eliminates data exposure while delivering the same conversion quality as server-based alternatives.
How Browser-Based Image Conversion Works
Load the image locally
You select an image file. The browser reads it using the File API and decodes it into pixel data in memory — no network request occurs.
Canvas rendering
The HTML5 Canvas API renders the image into a bitmap. This is the same technology browsers use to display images, running natively at full speed.
Re-encode to target format
The canvas exports the image in your chosen format (PNG, JPG, WebP, AVIF) with your specified quality settings. All encoding runs locally.
Download directly
The converted image is saved from browser memory to your downloads folder. No server is involved at any point in the process.
Frequently Asked Questions
Does converting an image on brevtool upload my photo?
No. Image conversion happens entirely in your browser using the Canvas API. Your image never leaves your device, and no pixel data or metadata is sent to any server.
Is EXIF data preserved or stripped during conversion?
By default, EXIF metadata (including GPS location) is stripped when converting between formats, which actually enhances your privacy. The converted image contains only the pixel data in the new format.
What formats are supported?
brevtool supports conversion between PNG, JPG/JPEG, WebP, AVIF, BMP, GIF, SVG, TIFF, ICO, and HEIC. All conversions run locally in your browser.
Can I convert multiple images at once?
Yes. Batch conversion is supported and all files are processed locally on your device in parallel.
Is the quality the same as server-based converters?
Yes. The Canvas API uses the same encoding libraries as server-side tools. You can adjust quality settings to balance file size and visual quality.
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