Shrink large Windows BMP bitmaps into JPG photos you can email and upload. Pick the quality, convert up to 30 files at once, nothing is uploaded.
Need WebP, AVIF or another format? Use the Image Format Converter.
Works in your browser. What you paste or upload is processed on your device.
Select or drag up to 30 bitmaps. Each file shows its pixel size and bit depth.
92% suits most images. Lower values make smaller files with more visible compression.
Press Convert to JPG. Each bitmap is decoded and compressed on your device.
Save the JPGs one by one or as a ZIP, and compare the size change shown next to each file.
BMP is Windows' original bitmap format. Most BMPs are stored uncompressed, which is why a 1920 × 1080 screenshot can weigh about 6 MB and is often too big to email or upload. JPG compresses photos and screenshots into a fraction of that size, and every device and website opens it.
This converter decodes each BMP with your browser's built-in image reader (1, 4, 8, 24 and 32-bit files, including the run-length-compressed variants), then saves it as a JPG at the quality you choose. The default of 92% is hard to tell from the original. A 32-bit BMP with transparency gets a background colour, because JPG can't be see-through.
When not to use JPG: for diagrams, text and pixel art, JPG adds faint smudges around sharp edges. Use BMP to PNG for those; it is lossless and still much smaller than BMP. Rare BMP variants that wrap a JPEG or PNG inside may not open.
BMP files from old software, scanners and screenshot tools waste space and get rejected by upload forms with size limits. Converting to JPG makes them small enough to share while keeping the picture looking the same.
Something else? Ask the team
A lot, for most images. An uncompressed 24-bit BMP stores 3 bytes per pixel, while a JPG of a photo at 92% is often a tenth of that or less. The result list shows the exact before and after sizes.
JPG is lossy, so a little detail is traded for size. At 85 to 95% the difference is hard to see on photos. For text, screenshots of code or pixel art, PNG is the better choice.
Standard Windows bitmaps at 1, 4, 8, 16, 24 and 32 bits per pixel, top-down or bottom-up, including RLE compression. BMPs that store a JPEG or PNG inside are rare and may not open.
No. Your browser reads and converts them, and they never leave your device.
Yes, up to 30 per run, each up to 100 MB. Download them together as one ZIP.
Yes. It runs in any modern browser, so you don't need Windows or Paint to convert a BMP.
1 free run per tool per day. After that each run costs 5 credits with a free account; one run covers the whole batch.
Each one opens on its own page and works straight away, with no sign-up.
Convert BMP bitmaps to lossless PNG
Convert TIFF files and multi-page scans to JPG
Convert Photoshop PSD files to PNG
Save the JPG preview inside DNG, CR2, CR3, NEF, ARW, RAF and ORF files
Explore more free tools:Schema GeneratorMeta Tag GeneratorLLMs.txt GeneratorBrowse all free tools
BMP to JPG Converter is one piece of the puzzle. See how ChatGPT, Gemini, Perplexity, and Google AI Overviews actually view your brand, and get a prioritised list of fixes, with a free AEO & GEO audit from AI Rank Lab.
Run a free AEO & GEO audit or View pricing.
Site audit
Paste your site. The free audit scores it for SEO, answer engines and generative engines, with the fixes.
