What is AVIF and why convert BMP to it?

AVIF (AV1 Image File Format) is a modern image format offering significantly better compression than BMP, JPG, or PNG at equivalent visual quality. BMP files are uncompressed and extremely large; converting to AVIF can reduce file size by 95% or more while preserving visual quality.

Does my data get uploaded to a server?

Never. All BMP decoding and AVIF encoding happens entirely in your browser using JavaScript and the Canvas API. Your images never leave your device.

Which browsers support AVIF output?

Chrome 85+, Edge 121+, and Firefox 93+ support AVIF encoding via the Canvas API. Safari does not yet support canvas AVIF output; Safari users will receive a fallback WebP or see a browser compatibility notice.

What quality setting should I use?

The default quality of 80 is ideal for most use cases — good visual quality with significant file size reduction. Use 90–95 for print or archival work where quality is paramount, and 60–70 for web thumbnails where size matters most.

What is the ZIP file named?

The ZIP is named dataconversioncenter_bmp_to_avif_YYYYMMDDHHMM.zip using your local time — for example dataconversioncenter_bmp_to_avif_202603061200.zip.

BMP to AVIF Converter

Convert BMP bitmap images to AVIF format locally in your browser. AVIF delivers up to 50% smaller files than PNG and JPG at equivalent quality. Batch convert, preview thumbnails, adjust quality, download individually or as a ZIP. No uploads, no account required.

⚠ Your browser may not support AVIF encoding. Chrome 85+, Edge 121+, and Firefox 93+ are recommended. Results will fall back to WebP if AVIF is not supported.

🖼️

Drop BMP files here

or Browse Files · Multiple files supported

Quality: 80

Download as ZIP ZIP named with timestamp · Individual download always available per file

What This Tool Does

Converts BMP (Bitmap) images to AVIF format entirely in your browser. BMP is an uncompressed Windows raster format — often enormous in file size. AVIF is a state-of-the-art format based on the AV1 video codec that delivers dramatically smaller files: a BMP that is 10 MB may become a 300 KB AVIF with no visible quality loss. No server upload, no account, no file size limits imposed by a backend.

Who This Is For

Web developers optimizing legacy BMP assets for modern websites
Designers converting BMP screenshots or illustrations for web delivery
Anyone who receives BMP files from older Windows software and needs a web-compatible format
Developers archiving large BMP files in a fraction of the storage space

Example: Input: screenshot.bmp (8 MB, uncompressed) → Output: screenshot.avif (~200 KB, visually lossless at quality 85)

💡 Need broader compatibility instead? Try BMP to WebP for wide browser support. For lossless archiving use BMP to PNG via drag and drop. To compress existing images further, use the Image Compressor.

Related Guides & Tutorials

Guide

BMP to AVIF: Complete Conversion Guide

What BMP and AVIF are, why converting from BMP to AVIF saves enormous space, and when to choose AVIF over WebP or PNG.

Tutorial

How to Convert BMP to AVIF: Step-by-Step

A hands-on walkthrough for converting BMP images to AVIF in your browser — quality settings, batch mode, ZIP download, and more.

Guide

Image Compression Guide

How to reduce image file sizes losslessly and what format is best for each use case.

Tool

⬇ Image Compressor

How It Works

Drop your BMP filesDrag one or more .bmp files onto the drop zone, or click Browse Files. Thumbnails generate immediately from the BMP data.

Set quality and click ConvertThe browser's Canvas API decodes each BMP and encodes it to AVIF. Quality 80 is the recommended default for web images.

Download your AVIFsDownload files individually or check "Download as ZIP" for a single timestamped archive. The tool resets after export.

🔒 Privacy & Security

All decoding and encoding runs entirely in your browser using the built-in Canvas API. BMP files are never sent to any server — they stay in your browser's memory from load to download. This is especially important for internal screenshots, design assets, or confidential documents saved as BMP.

You Might Also Need

Image to WebP → Image Compressor → Image Resizer → PNG to JPG → JPG to PNG →

BMP vs AVIF: Format Comparison

Property	BMP	AVIF
Compression	None (uncompressed)	Lossy or lossless AV1
Typical file size (1920×1080)	6–12 MB	100–500 KB
Transparency (alpha)	Limited (32-bit BMP only)	Full 8-bit alpha channel
HDR / wide color	No	Yes — 10-bit and 12-bit support
Animation	No	Yes (AVIS)
Browser support	Limited (no native web support)	Chrome 85+, Firefox 93+, Safari 16+
Best for	Windows legacy apps, raw pixel data	Web images, modern apps, archival
Created by	Microsoft (1987)	Alliance for Open Media (2019)

Frequently Asked Questions

Why are BMP files so large?▼

BMP stores raw pixel data with no compression. A 1920×1080 image at 24-bit color requires roughly 6 MB regardless of content complexity. There is no delta encoding, no frequency analysis — just one value per pixel per channel. AVIF reduces this by encoding only the differences between areas of similar color, yielding files 20–50× smaller.

What quality setting should I choose?▼

Quality 80 (the default) is appropriate for most web images — visually indistinguishable from the original at a fraction of the file size. Use 85–95 for print-quality or archival work. Use 60–70 for thumbnails or preview images where size is the priority.

Which browsers can open AVIF files?▼

Chrome 85+, Firefox 93+, Edge 121+, and Safari 16+ all support AVIF. As of 2026 AVIF has over 90% browser market share globally. For the small percentage of users on older browsers, provide a JPG fallback using the HTML <picture> element.

Can I convert multiple BMP files at once?▼

Yes — drop up to 25 or more files at once. The tool processes them sequentially, shows per-file status badges, and lets you download all AVIFs individually or as a single timestamped ZIP.

Does AVIF support transparency?▼

Yes — AVIF supports full 8-bit alpha transparency. If your source BMP includes transparent pixels (32-bit BMP with alpha), transparency will be preserved in the AVIF output.

Is this tool free with no limits?▼

Yes — completely free with no file size limits, no per-conversion limits, and no account required. Processing happens in your browser so we never see your files.