Convert BMP to PNG in your browser
Re-encode uncompressed BMP bitmaps as compressed PNG files. Conversion is lossless and runs entirely in your browser.
image/bmp,.bmp · runs locally · nothing uploaded
How it works
Pick an image, tune the options, then download the result. Everything runs in your browser.
- 01
Pick a BMP
Choose a .bmp bitmap. The original file is left untouched.
Files stay in memory as an
HTMLImageElement— the original bytes are never uploaded, and EXIF metadata is preserved until you explicitly transform it.uploadcanvaslocaldecodeinput · bytesbmp · loadedfile.bmp
loaded · decodedcanvas · ready - 02
Decode pixels
The browser draws BMP pixels onto a hidden canvas — no upload required.
Encoder quality is exposed where the format supports it — JPEG and WebP get a
0–1quality slider; PNG is lossless. Options re-render the canvas immediately.decodeoptionslive previewencoderqualitycanvas · tunabledraw · livectx.drawImage(img, 0, 0)
options applied · liveencoder · live - 03
Encode PNG
Re-encode the canvas as a lossless, compressed PNG file.
Pixel work runs on the Canvas 2D context —
drawImageresamples with the browser’s bilinear filter andgetImageData/putImageDataback per-pixel passes.encoderenderCanvas 2Dpreviewpx-perfectencode · resampledpng · px-perfecttoBlob("image/png")preview · livepx-perfect - 04
Download PNG
Save the result — expect a much smaller file than the original bitmap.
Downloads ship via a hidden anchor with an object URL — no server round-trip, and the file on disk is untouched. The output filename inherits a sensible suffix.
exportdownloadblobclient-sideobject URLok · blobready · savedfile.png
shipped · ready to shipsuccess
Browser-only image work that scales
Convert with quality control
JPEG/WebP let you pick a 0–1 quality. Default 0.92 is a good compromise of size and visible quality.
PNG isn’t free
Use PNG only for transparency or sharp edges. For photos, WebP is smaller at the same perceived quality.
Strip EXIF for privacy
Photo EXIF often contains GPS, camera model, and timestamps. Strip before sharing public uploads.
Watch the colour profile
Convert to sRGB before web export. Wide-gamut images render oversaturated in non-managed browsers.
AVIF when it’s available
AVIF beats WebP on size at the same quality. Detect support via <picture> with fallbacks.
Lazy-load below the fold
Add loading="lazy" on <img>. The browser handles scheduling — no IntersectionObserver needed.
When to use this tool
Common workflows it speeds up.
Web-ready bitmaps
Browsers serve PNG faster than BMP. Decoded into a Canvas 2D context — original bytes never leave the tab, so you can process customer-uploaded photos, internal screenshots, or sensitive diagrams without privacy concerns.
px-perfectArchive shrink
PNG compression slashes BMP archive size. Encoders expose quality 0–1 where the format supports it (JPEG, WebP); PNG and AVIF stay perceptually lossless. Pick 0.85 for web, 0.95 for archival, 0.7 for thumbnails.
quality-tunableLossless edits
Keep raw pixel fidelity for further editing. Pair with the EXIF Stripper before sharing user-uploaded photos publicly. Camera serial numbers, GPS coordinates, and timestamps often hide in image metadata and leak more than the picture itself.
format-awarePipeline ingestion
Most build tools speak PNG natively. Output preserves colour profile (sRGB) so it renders consistently across browsers, monitors, and print pipelines. Wide-gamut workflows can opt into Display P3 for modern Apple devices.
EXIF-safeQuick previews
PNG renders faster in image viewers. Re-runs only on option changes, never on window resize, so the canvas stays responsive on large images. drawImage uses the browser's bilinear filter for fast resampling.
client-sideUniversal compatibility
PNG is supported everywhere modern. Downloads as .png, .jpg, .webp, or .avif with the correct MIME so editors apply native handling on save. The filename inherits a sensible suffix derived from the input.
compression-readyFrequently asked questions
Something missing?
Tell us what you need. We ship the top requests every two weeks.