What's the difference between BMP and JPEG XL?

BMP is a Windows-era uncompressed raster format. JPEG XL is a modern, royalty-free image format with state-of-the-art compression.

What quality should I pick?

For JPEG XL, quality 75-85 is the sweet spot — small files with no visible difference from the original. Lower than 60 starts to show artifacts. Higher than 90 mostly just makes the file bigger.

Does this work on mobile?

Yes. The drop zone falls back to your phone's file picker, and conversions run on-device just like desktop. Large files may be slower on mobile due to CPU and memory constraints, but the workflow is identical.

What's the maximum file size?

No hard limit — the browser handles it. Files under 50MB convert in a few seconds. Larger files work but may take longer as the browser allocates memory. If you hit issues, batch in smaller groups.

Convert BMP to JPEG XL

Convert BMP files to JPEG XL in your browser. JPEG XL files are typically smaller than BMP. Free, no upload, no signup.

Drop images to convert

PNG, JPG, WebP, AVIF, JPEG XL, TIFF, BMP, GIF, SVG, HDR, ICO — any combination

Files stay on your device. Open DevTools' Network tab to verify.

Output format

JPEG XL

Quality82%

01 — Overview

Why convert BMP to JPEG XL

JPEG XL files are typically much smaller than BMP at equivalent quality — usually the main reason to make this conversion. Smaller files mean faster page loads, smaller email attachments, and less storage.

02 — Comparison

BMP vs JPEG XL

Attribute	BMP	JPEG XL
Compression	—	Lossy or lossless
Transparency	No	Yes
Animation	No	Yes
Typical file size	Very large	Small
Browser support	Major browsers will render BMP, but it's never the right choice for the web.	Limited — Safari 17+ supports it; Chrome and Firefox are still behind flags or pending. Great for archival and apps that control their own decoder.

03 — How to

Three steps

01
Drop your BMP files
Drag one or more BMP files onto the dropzone above, or click to browse. Files stay on your device — nothing uploads.
02
Convert in your browser
convert.now decodes each BMP and re-encodes it as JPEG XL via WebAssembly. The conversion runs in a Web Worker so the page stays responsive.
03
Download the result
Download a single JPEG XL file or, for batch conversions, a zip of all converted files. Filenames preserve the originals.

04 — Pillars

Why convert.now

Private
Files stay in your browser. No upload step. Nothing for anyone to see.
Fast
No queue, no upload wait. Conversion starts the moment you drop a file.
Free
No ads. No file-count limit. No sign-up wall. Just the converter.

05 — FAQ

Frequently asked

No. The conversion from BMP to JPEG XL runs entirely in your browser using WebAssembly. Files never leave your device. Open DevTools' Network tab if you'd like to verify — there are no network requests with file contents.

06 — More

Why convert BMP to JPEG XL

BMP vs JPEG XL

Three steps

Drop your BMP files

Convert in your browser

Download the result

Why convert.now

Frequently asked

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