AVIF to BMP Converter: Free, Private, No Upload

Convert AVIF files to BMP in your browser. Lossless output, batch up to 20 files at once, no upload, no account, no watermark. Your files never leave your device.

AVIF to BMP
Batch up to 20 files
No upload, no account
Metadata stripped

1Add up to 20 images
2Pick from 18 formats
3Download or copy the code

Processed on your device. Your images are never uploaded, and metadata is stripped. How we keep it private

How do I convert AVIF to BMP for free?

Drop your AVIF files into the tool above, choose BMP as output, and download the result. Everything runs in your browser, so nothing is uploaded and there is no limit or watermark. It works on Windows, Mac, Linux, ChromeOS, iOS and Android — anywhere you have a modern browser.

Price: Free, no credits and no daily cap
Account required: No
File uploaded to server: No, processed locally in your browser
Batch limit: Up to 20 files at once
Input format: AVIF
Output format: BMP
Best for: BMP workflows, lossless quality, editing, printing
Works on: Chrome, Edge, Firefox, Safari, iOS and Android browsers
Privacy: No upload, no tracking, metadata stripped
Output quality: Lossless, exact pixels

How to convert AVIF to BMP

1
Drop your AVIF files
Drag up to 20 AVIF files onto the page or click to choose them. Everything runs in your browser.
2
BMP is preselected
Output is already set to BMP. Adjust quality, resize or batch if you want.
3
Download
Save each BMP, or download all of them together as a ZIP.

AVIF to BMP: what changes and when it makes sense

AVIF is an AV1 Image File Format. It is best known for the smallest files of any common web format at a given quality. The main drawbacks are slow encoding, patchy support outside browsers, and smoothing in fine textures at aggressive settings.

BMP is a Bitmap image format. It is best known for a simple structure that legacy programs and embedded systems can read without a decoder library. The main drawbacks are enormous files and no reliable transparency.

AVIF vs BMP at a glance

Property	AVIF	BMP
Type	Raster image	Raster image
Compression	Lossy or lossless, based on the AV1 video codec	Usually uncompressed (run-length encoding exists but is rare)
Transparency	Full alpha channel with soft edges	None
Animation	Yes	No
Colour depth	8, 10 or 12 bits per channel, with HDR and wide-gamut support	1 to 32 bits per pixel
Support	Supported by current Chrome, Edge, Firefox and Safari, but many editors, social platforms and OS viewers cannot open it	Opens in browsers and most desktop software, but almost never used on the web
History	Finalised in 2019 by the Alliance for Open Media (Google, Mozilla, Apple, Microsoft, Netflix, Amazon, Intel and others). Based on AV1 video codec, successor to VP9 and HEVC. First major browser support: Chrome 85 (2020).	Created by Microsoft for Windows 1.0 in 1985 as the native bitmap format for the Windows Graphics Device Interface. The "BM" signature has been unchanged since then. Still used in embedded systems and legacy Windows software.

What actually changes in this conversion

AVIF can be lossy or lossless. If your file was saved lossy, converting to BMP stops further loss but does not restore detail.
BMP cannot store transparency, so transparent areas are filled with white.
AVIF can hold animation, but BMP cannot, so the result is a single still frame.
Expect the BMP file to be far larger than the AVIF source.
Browser-based conversion works in 8-bit sRGB. Wide-gamut, 10-bit and 16-bit data are reduced. For colour-critical work, keep the original.
EXIF, GPS and camera data are stripped on every conversion. That is good for privacy, but you lose capture dates.

About AVIF: history and technical details

Finalised in 2019 by the Alliance for Open Media (Google, Mozilla, Apple, Microsoft, Netflix, Amazon, Intel and others). Based on AV1 video codec, successor to VP9 and HEVC. First major browser support: Chrome 85 (2020).

Technical: AV1 intra-frame coding with variable block sizes from 4x4 to 128x128. Supports 8/10/12-bit colour, HDR, wide gamut (BT.2020), monochrome. HEIF-based container. Encoding is 10-100x slower than JPEG.

Real-world size: AVIF at quality 50 produces files 30-50% smaller than JPG at quality 85 with similar visual quality. Netflix reports 50% bandwidth savings after switching. Google reports AVIF is 20-30% smaller than WebP.

Popular tools: Adobe Photoshop 2024+, GIMP 2.10+, Squoosh, avifenc, ImageMagick, AVIF.io, Netflix (production use).

Alternatives: WebP (faster encode, less compression), JPG (universal), HEIC (Apple-only), JPEG XL (future format).

About BMP: what you get

Created by Microsoft for Windows 1.0 in 1985 as the native bitmap format for the Windows Graphics Device Interface. The "BM" signature has been unchanged since then. Still used in embedded systems and legacy Windows software.

Technical: File header 14 bytes (signature, size, reserved, offset) followed by DIB header (40+ bytes). Supports 1, 4, 8, 16, 24, 32-bit pixels. Rows padded to 4-byte boundaries. Pixels can be stored bottom-up or top-down. Optional RLE4/RLE8 rarely used.

Real-world size: A 12-megapixel photo is 36 MB as 24-bit BMP. As JPG it is 2-4 MB (90% smaller). A 1920x1080 screen at 32-bit BMP is 8.3 MB; as PNG 200-600 KB.

Popular tools: Windows Paint, IrfanView, XnView, ImageMagick, GIMP, Adobe Photoshop, embedded dev tools.

Alternatives: PNG (lossless, 5-20x smaller), TGA (game pipelines), TIFF (professional print), JPG (lossy, much smaller).

Browser and software compatibility

AVIF: Supported by current Chrome, Edge, Firefox and Safari, but many editors, social platforms and OS viewers cannot open it. BMP: Opens in browsers and most desktop software, but almost never used on the web.

BMP output opens in browsers and most desktop software, but very few web workflows expect it.

Why people move away from AVIF

Outside browsers, AVIF support is thin. Many editors, email clients and social platforms cannot open it.
Uploaders that accept only JPG or PNG reject AVIF files.
Fine texture such as film grain or fabric can look smoothed at aggressive AVIF settings.

Why people choose BMP

Some legacy Windows software, embedded displays and industrial tools only read BMP.
With no compression there is no decoding step and no compression artefacts.

Common mistakes with AVIF

Encoding AVIF at quality 90 thinking it will match JPG 90 — AVIF scale is different
Using AVIF for small icons — encoding overhead wastes savings
Expecting Photoshop (pre-2024) to open AVIF files — it will not

Best practices for keeping quality

AVIF files are often made for the web already. If you need to edit one, convert from the original source rather than stacking another lossy pass.
Expect a very large file. Check the upload limit and free disk space before saving.
Flatten any transparency first. BMP does not reliably carry an alpha channel.
Resize before converting if the image will be shown small. A 4000 pixel photo displayed at 800 pixels wastes bytes in any format.
Check the result at 100 percent zoom, especially around text, edges and gradients, before you replace any originals.
Keep your original files. Conversions to a lossy format cannot be undone.
When you convert a set of images, use the same quality setting for the whole batch. The converter handles up to 20 files at once.

AVIF to BMP questions

Quick answers about privacy, quality, supported formats, file limits and how BMP works.

Why convert AVIF to BMP?

BMP is lossless. It keeps every pixel exactly. It is the safe choice when you plan to edit, print or need exact pixel data.

Will converting AVIF to BMP lose quality?

No. BMP is lossless, so nothing is thrown away.

Does BMP keep transparency?

No. BMP does not support transparency. Transparent areas will be filled with white.

Are my files uploaded?

Never. Everything runs in your browser. Your files never leave your device. Open DevTools Network tab while processing — you will see no upload request.

Can I convert many files at once?

Yes, up to 20 files at once. Download them individually or all together as a ZIP.

Does the converter strip metadata?

Yes. Browsers do not pass EXIF data through a canvas, so GPS, camera model and dates are removed on every conversion. That is good for privacy.

Is it free?

Yes. No credits, no daily cap, no account, no watermark. The practical limit is your device memory.

Why is BMP so large?

Because it stores raw pixel data with little or no compression. A 12-MP photo as 24-bit BMP is 36 MB, compared to 2-4 MB as JPG. The tradeoff is speed (no decoding needed) and lossless quality.

Your files never leave your device

No upload, no account, no tracking. Everything happens in your browser using the Canvas API and WebAssembly. You can confirm this in your browser's DevTools Network tab while the tool runs — no request carries your file. See why ToolDeck is different.