AVIF to BMP Converter

How to Convert AVIF to BMP Online

1. Upload Your AVIF File: Drag and drop or click "Add Files" to select AVIF images. Photos saved from Chrome / Edge, exports from Squoosh, GIMP 2.10+, Photoshop 23+, and CDN-served .avif downloads all work. Batch is supported — drop in an entire folder of website saves or marketplace downloads.
2. Pick Bit Depth and Compression Type: Choose 1-bit (monochrome), 8-bit (256-color indexed), or 16-bit color depth. Set the BMP compression type — None (uncompressed RGB, the most compatible) or Deflate for a smaller file. BMP is lossless; the AVIF pixels are decoded once and written byte-for-byte into the bitmap.
3. Resize and Set DPI (Optional): Pick a resolution preset (4320p / 2160p / 1440p / 1080p / 720p / 480p down to 16p), scale by percentage, or set custom width × height in pixels or percent. Set DPI from 72 / 96 (screen) up to 150 / 200 / 300 / 400 / 600 / 1200 (print). Color palette size (2 / 4 / 8 / 16 / 32 / 64 / 128 / 256 colors) lets you generate indexed-color BMPs for palette-locked tooling.
4. Convert and Download: Click Convert. Files convert in your browser session and download individually or as a ZIP — no sign-up, no watermark.

Why Convert AVIF to BMP?

AVIF (AV1 Image File Format) is the most compression-efficient mainstream image format — it stores photos at 50-70% smaller file sizes than JPG by piggy-backing on the AV1 video codec. Chrome shipped support in 2020 and Safari followed in macOS 13 / iOS 16. BMP is the opposite end of the spectrum: Microsoft's device-independent bitmap format from Windows 3.0 (1990), uncompressed by default, and read by virtually every Windows tool ever shipped. Converting AVIF → BMP is what you do when a downstream tool refuses anything but raw bitmaps.

• Editing AVIF artwork in legacy Windows tools — Classic Microsoft Paint, IrfanView, and old MFC-era image editors read BMP natively but can't open .avif at all. Photoshop only added native AVIF support in v23.2 (2022); anything older needs a BMP intermediate.
• Embedded systems and microcontroller displays — STM32 / ESP32 graphics libraries, e-paper drivers, and old printer firmware ship BMP parsers but rarely an AVIF decoder. Flashing a splash screen or UI sprite onto a small LCD usually means a 24-bit BMP.
• Image processing pipelines and OCR — OpenCV, ImageMagick scripts, Tesseract, and most computer-vision libraries expect uncompressed single-frame inputs. BMP is the lowest-common-denominator lossless format — no codec surprises, no HDR quirks, no animation frames to strip.
• CNC, laser engravers, and vinyl cutters — LaserGRBL, LightBurn, and many vinyl-cutter drivers accept BMP as the canonical raster import. Engraving software often needs a flat 1-bit or 8-bit indexed BMP for accurate dithering.
• Forensic and archival pipelines — Bit-for-bit pixel preservation matters when an image is evidence or a reference master. BMP stores raw RGB bytes with no decoder ambiguity, unlike AVIF's lossy / lossless dual modes.
• Resaving website downloads for offline tools — Modern sites serve AVIF via <picture> elements. Right-click "save image as" grabs the .avif bytes, but the recipient tool may need BMP. Conversion bridges the gap.

If your destination tool accepts a smaller modern format, AVIF to PNG keeps lossless quality at a fraction of the size. For broadly shareable photos, AVIF to JPG is usually the better pick.

AVIF vs BMP — Format Comparison

BMP Bit Depth Quick Guide

Frequently Asked Questions

Why is my BMP so much larger than the original AVIF?

AVIF uses the AV1 codec's intra-frame compression — roughly twice as efficient as JPG and dramatically more efficient than uncompressed BMP. A 500 KB AVIF photo typically becomes a 20-50 MB BMP at 24-bit. That's the cost of raw-pixel storage. To shrink the output, pick Deflate compression in step 2, drop to 8-bit indexed for palette-friendly artwork, or reduce resolution in step 3.

Will transparency from the AVIF survive in the BMP?

Partially. AVIF stores a full 8-bit alpha channel. BMP can carry 32-bit RGBA via the BITMAPV4HEADER, but many older Windows tools — including classic Paint pre-Windows 7, embedded firmware parsers, and most CNC / laser engraver imports — render the alpha channel as solid black or white. If your target reader is one of those legacy tools, flatten transparency to a chosen background color before converting.

What about animated AVIF?

Animated AVIF (used for short loops and animated stickers) can't fit into a still BMP. The conversion extracts the first frame and saves it as a single bitmap. If you need to keep the animation, AVIF to GIF preserves the frame sequence in a format BMP can't represent.

What about HDR or 10-bit AVIF photos?

BMP tops out at 8 bits per channel for standard 24-bit RGB output. A 10-bit or 12-bit HDR AVIF (HDR10, PQ, HLG) is tone-mapped down to 8-bit sRGB during conversion. Highlights that exceeded the SDR range will be clipped. If preserving HDR matters, BMP is the wrong target — keep it as AVIF or use a format that carries higher bit depth.

Should I pick 8-bit, 24-bit, or 32-bit BMP?

8-bit (256-color indexed) is best for pixel-art-style artwork, monochrome glyphs, and palette-locked workflows like laser engraving — smallest file, exact color match. 24-bit RGB is the safe default for any AVIF photo with gradients or photographic content. 32-bit RGBA preserves alpha but only matters if the consumer actually reads alpha (modern editors yes, embedded firmware usually no).

Will EXIF metadata (date, camera, GPS) survive?

No — BMP has no standard metadata segment. Camera, lens, ISO, GPS coordinates, and capture date in the AVIF header are dropped during conversion. If preserving EXIF matters, AVIF to JPG or AVIF to TIFF keep the metadata block intact.

Why does my embedded device or CNC tool need BMP specifically?

Many small-footprint parsers ship a BMP-only decoder because the format is trivially simple — a fixed-size header followed by raw pixel rows. AVIF requires shipping an AV1 decoder (megabytes of code), which is impractical on microcontrollers, older firmware, and single-purpose machines like vinyl cutters. BMP is the universal lowest-common-denominator.

Can I batch convert hundreds of AVIFs at once?

Yes — drop in entire folders of AVIFs (a website save, a Squoosh export batch, downloaded marketplace listings). Each file converts in parallel within your browser session and downloads individually or as a single ZIP. Settings (bit depth, compression type, DPI, target resolution) apply uniformly across the batch.

Why not convert to PNG instead?

PNG is usually better — smaller, lossless, alpha-aware, and universally supported. Pick BMP when your target tool specifically demands it: legacy Windows imaging code, embedded display libraries that ship a BMP-only parser, certain CNC / laser engraver workflows, or forensic / archival pipelines that mandate raw-pixel uncompressed storage. For everything else, AVIF to PNG is the better choice.