BMP to AVIF v1.0

A BMP to AVIF converter turns uncompressed Windows bitmap files into AVIF, a modern image format built on the AV1 video codec. The size gap between the two is dramatic. A 1600 by 1200 pixel photo saved as BMP weighs 5,625 KB, while the same picture saved as AVIF at the default setting comes in at 60 KB. The DocPivot converter runs entirely in your browser, accepts up to 30 bitmaps at once, and includes a true Lossless mode for images that must stay identical to the original, pixel for pixel.

What DocPivot BMP to AVIF Converter Does

The tool decodes each BMP file in your browser and re-encodes it as AVIF with libavif, the reference AVIF library from the Alliance for Open Media, compiled to WebAssembly. Every file is written as an 8-bit AVIF at encoder speed 6 with sharp YUV, a color conversion method that keeps hard edges and small text crisp. You pick one of four quality chips and DocPivot handles the rest. Lossless stores full 4:4:4 color and reproduces every pixel, while the three lossy chips use 4:2:0 chroma subsampling to produce much smaller files.

Who Uses a BMP to AVIF Converter

Most users are holding bitmaps from software that still saves BMP by default. Common sources include Microsoft Paint, older flatbed scanners, industrial and lab cameras, game modding tools, and legacy Windows applications. Web developers, WordPress and WooCommerce store owners, bloggers, and archivists convert these files to AVIF so the images load quickly on modern sites without visible loss of detail.

The Problem It Solves

BMP stores raw pixel data with no compression, so a single 1920 by 1080 screenshot runs to roughly 6 MB. That weight is too heavy for most upload forms, slows down web pages, and fills cloud storage quickly. Converting to AVIF cuts the file by up to 99 percent on photographic content. If you need an exact copy that opens in almost every app instead, converting BMP to PNG keeps every pixel in a universally supported format, and the general image converter covers other output types.

Key Benefits of DocPivot BMP to AVIF Converter

The main benefit is size: bitmaps measured in megabytes become AVIF files measured in kilobytes, at a quality level you control.

• Massive size reduction. In internal testing, a 5,625 KB photographic BMP dropped to 60 KB at the Good preset. That 99 percent saving makes the image practical for any web page.
• Pixel-exact archives. Lossless mode reproduces every pixel of the bitmap and still produced a file 68 percent smaller than the original BMP in the same test.
• Privacy by default. Normal-sized files never leave your device. This matters for scanned documents, internal screenshots, and unreleased client artwork.
• Faster loading pages. Lighter images reduce total page weight, which supports better Largest Contentful Paint results in Google PageSpeed Insights. For JPG and PNG files you already have, the image compressor does a similar job.
• Batch time savings. Thirty bitmaps convert in one pass and download as a single ZIP, so you do not repeat the same steps for each file.
• Predictable upload sizes. The optional size limit finds the highest quality that fits under a target such as 200 KB, which helps with strict CMS or marketplace caps.
• No cost or account. The converter is free, requires no sign-up, and is available in 18 languages.

Core Features of DocPivot BMP to AVIF Converter

• Four quality chips. Lossless, High, Good, and Smaller file map to exact encoding, quality 90, quality 80, and quality 65. You choose an outcome instead of guessing a number.
• True Lossless AVIF. Full 4:4:4 color encoding reproduces the bitmap with zero pixel difference, which suits archives and reference images.
• libavif in WebAssembly. The AV1 reference encoder runs inside your browser tab, so normal conversions never wait in a server queue.
• Sharp YUV conversion. This RGB to YUV method reduces color bleeding around text, interface elements, and line art, all of which are common in BMP screenshots.
• Batch of 30 files. Drop up to 30 bitmaps at once. When several finish, they download together as one ZIP archive.
• Optional size limit. Choose a target between 100 KB and 1 MB, and the tool searches for the highest quality that still fits.
• Picture size control. Keep the original dimensions or scale down to 2048 px or 1200 px before encoding. For custom dimensions, the image resizer gives finer control.
• Automatic fitting for huge images. AVIF limits each side to 16,384 pixels, so larger bitmaps are scaled to fit and the result card tells you this happened.
• Server fallback that keeps Lossless. Bitmaps too large for browser memory are converted on the server by libvips with the same chip you picked, including Lossless.
• Before and after slider. Each result has a comparison slider, so you can inspect fine detail before you download anything.
• Clear result reports. Every file shows its dimensions, new size, percentage saved, and any notes about fitting or fallback.

How DocPivot BMP to AVIF Converter Works

The conversion follows five steps, and DocPivot keeps all of them inside your browser unless a file is too large for its memory.

1. Add your bitmaps. Drag in up to 30 BMP files or select them from your device, and the browser decodes each one.
2. Pick a quality chip. Choose Lossless, High, Good, or Smaller file. Good is selected by default.
3. Adjust advanced settings if needed. Add a size limit between 100 KB and 1 MB, or choose a smaller picture size.
4. Let the encoder run. libavif writes each AVIF, while oversized images are fitted or routed to the server fallback automatically.
5. Review and download. Check the slider and the size report, then download a single AVIF or a ZIP for the whole batch.

DocPivot BMP to AVIF Quality Presets Compared

Each chip trades file size against fidelity, and the measured results below show exactly how far apart they sit. All figures come from one 1600 by 1200 photographic BMP of 5,625 KB. PSNR (peak signal-to-noise ratio) is measured against the original bitmap, and a higher number means the output is closer to the source.

PSNR values in the mid-40s are usually very hard to distinguish from the source at normal viewing size, so all three lossy chips look clean on a typical photo. Your own results will vary. Flat screenshots and diagrams usually compress further than this test image, noisy photos with heavy grain compress less, and encode times depend on your device.

When to Use DocPivot BMP to AVIF Converter

Use this converter when BMP files need to go somewhere that file size matters, such as a website, an email, or long-term storage. It is the right choice when your audience views images in a modern browser, because Chrome 85 and later, Firefox 93 and later, Safari 16.4 and later, and Edge 121 and later all display AVIF natively.

• Publishing scans online. Turn scanner output saved as BMP into light images for blogs, galleries, and product pages.
• Clearing old asset folders. Shrink directories of legacy bitmaps that consume disk space or cloud storage quota.
• Archiving exact copies. Use Lossless when the image must remain identical, such as reference captures or quality control screenshots.
• Meeting upload limits. Set the size limit to fit forms, job portals, or marketplaces that reject large files.
• Publishing documentation screenshots. Convert BMP captures from Paint or older tools before adding them to a knowledge base or help center.
• Preparing web game assets. Convert BMP textures and sprites into AVIF for browser builds that need to load fast.
• Converting a trimmed area. If only part of the bitmap matters, crop the image first, then convert the smaller area to AVIF.

Skip AVIF when the file is headed to software that cannot read it yet, including some design and office apps. In those cases a JPG or PNG export is the safer route.

DocPivot BMP to AVIF Converter Use Cases

WooCommerce Product Photos

Context: A small store owner has 25 product photos exported from an old photo station as 24-bit BMP files.

• Load all 25 bitmaps into the converter in a single batch.
• Keep the Good chip and set the picture size to 2048 px.
• Download the ZIP and upload the AVIFs to the WordPress media library.

Result: Based on the benchmark ratio, bitmaps similar to the test image shrink to around 60 KB each, so product pages load far faster.

Exact Archive of Scanned Records

Context: An office archive holds thousands of scanned pages stored as BMP by an older document scanner.

• Select the Lossless chip so every pixel is preserved.
• Convert the pages in batches of 30 and keep each ZIP.
• Spot check a few files with the before and after slider.

Result: Every page stays pixel-identical while storage drops, by 68 percent on the photographic test file and often more on text-heavy scans.

Developer Documentation Screenshots

Context: A developer has BMP screenshots from a legacy Windows tool for a documentation site built with a static site generator.

• Choose the High chip to keep menu text and icons sharp.
• Set the picture size to 1200 px to match the content column width.
• Convert any TIFF captures from the same project with TIFF to AVIF.

Result: Screenshots load quickly while small interface text stays readable, thanks to sharp YUV and the higher quality setting.

Freelancer Delivering Web Assets

Context: A freelance web designer receives a client's brand photos as BMP files from an outdated design workflow.

• Pick the Good chip and set a 200 KB size limit for hero images.
• Compare each result with the slider before downloading.
• Run the client's PNG logos through PNG to AVIF for one consistent format.

Result: Every image fits the page weight budget, and the site ships with a single modern image format throughout.

Choosing Lossless or Lossy in DocPivot BMP to AVIF

Choose Lossless when the AVIF must match the bitmap exactly, and choose a lossy chip when the image is meant for viewing. Lossless keeps full color resolution and zero pixel difference, which is what archives, reference images, and quality control captures need. The trade-off is size. On photographs, a Lossless AVIF is many times larger than the lossy chips, at 1,811 KB versus 60 KB for Good in the benchmark.

Lossless AVIF is also not always the smallest exact format. On flat graphics with large areas of solid color, lossless PNG or lossless WebP can come out smaller, so for exact copies of diagrams and interface captures it is worth comparing against BMP to WebP as well.

• Lossless: Archives, reference images, and any file that must stay exact.
• High: Screenshots, text-heavy images, and detailed product close-ups.
• Good: Most website photos, blog images, and gallery content.
• Smaller file: Thumbnails, previews, and images sent by email.

How DocPivot BMP to AVIF Compares to Other Converters

The main difference is where the conversion happens and how much control you have before it starts. Popular online converters such as CloudConvert, Convertio, and ezgif process BMP to AVIF on their own servers, so every file is uploaded first. ezgif, for example, accepts BMP files up to 200 MB and deletes uploads after one hour. DocPivot converts normal files locally and only uploads bitmaps too large for browser memory, which are deleted within 30 minutes.

Browser-based conversion is not unique, though. Google's Squoosh also runs libavif in the browser, offers a lossless AVIF option, and is excellent for fine-tuning one image with detailed encoder settings. The practical difference is volume. The Squoosh web app works on one image at a time, while this converter handles 30 bitmaps per batch with a single ZIP, adds an automatic size limit, and keeps Lossless available even when a huge file has to go to the server.

DocPivot BMP to AVIF Converter Limitations

• Lossless files are large on photos. Because every pixel is kept, a Lossless AVIF of a photograph is roughly 30 times larger than the Good chip.
• App support is still catching up. Figma does not import AVIF natively, and in our testing iMessage and PowerPoint for Mac could not open AVIF files either. For those destinations, BMP to JPG is the safer conversion.
• 8-bit output only. The encoder writes 8-bit AVIF, which matches standard 24-bit and 32-bit bitmaps but does not create HDR images.
• Very large images are resized or uploaded. Sides above 16,384 pixels are fitted, and bitmaps too big for browser memory go to the server with a 100 MB upload cap.
• Results depend on content. The benchmark uses one photographic image, so savings on your own files will differ.
• Downloads are manual. Results are not saved anywhere automatically, so download each file or the ZIP before closing the tab.

If you already have AVIF files that a colleague cannot open, convert them back with AVIF to JPG or AVIF to PNG rather than reconverting from the original bitmap.

Frequently Asked Questions About DocPivot BMP to AVIF Converter