CONVERT
MJPEG → BMP
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Fast, secure MJPEG to BMP conversion. No registration required.
Situation. MJPEG is a video container, so playback depends on the codec inside as well as the wrapper itself. Solution: a BMP, produced below. A BMP pulled from a MJPEG is the fastest way to get a blog-ready illustration out of a video asset you already have. Skip the screenshot-and-crop dance: point at the MJPEG, pick a moment, receive a clean BMP. In practice MJPEG is a video container, so playback depends on the codec inside as well as the wrapper itself. On the other end, BMP is the uncompressed Windows bitmap format — bulky but pixel-perfect.
Motion JPEG
Source formatMotion JPEG (MJPEG) is a video format where each frame is independently compressed as a JPEG image. This intraframe-only approach enables easy frame-accurate editing and is widely used in security cameras and digital camera video modes.
BMP Image
Target formatBMP is an uncompressed raster image format native to Windows. Files are large but preserve exact pixel data with no compression artifacts. Rarely used on the web due to file size.
Why convert MJPEG to BMP
Image-only destinations like printed documents, favicons and email newsletters will reject MJPEG outright. Extracting to BMP unlocks those channels without asking you to cut and re-render the video in an NLE.
HOW TO CONVERT
MJPEG → BMP
Provide the video
Select or drop a MJPEG file. The pipeline reads the header and figures out the frame timing.
Extract the still
We decode the requested frame at its native resolution and encode it as a BMP.
Save the image
Download the BMP. Original and output are auto-deleted within two hours.
Common Use Cases
Contact sheets
Extract one BMP per N seconds of a MJPEG to build a visual index of long footage.
Training slide decks
Drop BMP stills from a tutorial MJPEG into PowerPoint or Keynote to create a still-frame walk-through.
Chat-friendly previews
Teams and Slack preview BMP files inline but won't autoplay every MJPEG — pick a frame and share that instead.
Print-ready stills
Magazines and posters need a BMP at print DPI. Extract the best frame from a MJPEG master for hand-off to the print shop.
MJPEG vs BMP — Strengths and limitations
What each format does best, and where it falls short.
MJPEG Strengths
- Trivially simple — any JPEG decoder handles frames.
- Every frame is a keyframe — instant seek and edit.
- No inter-frame dependencies — recover from packet loss easily.
- Hardware cost is minimal — any JPEG decoder works.
- Lossless across edits — cutting and rejoining doesn't degrade quality.
Limitations
- 3-5× larger than MPEG-2; 8-10× larger than H.264 at comparable quality.
- No audio — requires a separate track.
- No standard container — appears inside AVI, MOV, MKV, MJPEG-over-HTTP.
BMP Strengths
- Dead-simple format — trivially easy to read and write.
- Lossless and uncompressed — perfect bit-exact pixel storage.
- Universally supported in Windows applications since 1985.
- Supports 1, 4, 8, 16, 24, and 32-bit color depths.
Limitations
- Enormous file sizes — no meaningful compression in typical use.
- Not a web format — browsers support it but nobody serves BMPs over HTTP.
- No metadata support (no EXIF, no ICC profile in practice).
MJPEG vs BMP — Technical specifications
Side-by-side comparison of the technical details.
MJPEG
- MIME type
- video/x-motion-jpeg
- Extension
- .mjpeg, .mjpg
- Frame format
- Sequential JPEG (Baseline, usually 4:2:0)
- Typical containers
- AVI, MOV, MP4 (rare), raw stream
- Common in
- IP security cameras, USB webcams, scientific imaging
BMP
- MIME type
- image/bmp
- Extensions
- .bmp, .dib
- Compression
- None (typical); RLE 4/8 bit (rare)
- Color depths
- 1, 4, 8, 16, 24, 32 bits per pixel
- Byte order
- Little-endian
| Specification | MJPEG | BMP |
|---|---|---|
| MIME type | video/x-motion-jpeg | image/bmp |
| Extension | .mjpeg, .mjpg | — |
| Frame format | Sequential JPEG (Baseline, usually 4:2:0) | — |
| Typical containers | AVI, MOV, MP4 (rare), raw stream | — |
| Common in | IP security cameras, USB webcams, scientific imaging | — |
| Extensions | — | .bmp, .dib |
| Compression | — | None (typical); RLE 4/8 bit (rare) |
| Color depths | — | 1, 4, 8, 16, 24, 32 bits per pixel |
| Byte order | — | Little-endian |
MJPEG vs BMP — Typical file sizes
Approximate file sizes for common scenarios.
MJPEG
- 1-min VGA webcam clip 40-80 MB
- 1-min 1080p IP camera stream 300-500 MB
- Canon DSLR 720p video (1 min) ~550 MB
BMP
- Small icon (32×32) 4 KB
- Screenshot (1920×1080) ~6 MB
- 4K image (3840×2160) ~25 MB
- Scanned A4 at 300 dpi ~25 MB
Quality & Compatibility
Colour rendering depends on the MJPEG video's colour space. BT.709 HD video and BT.2020 HDR content both map cleanly into a standard sRGB BMP; true HDR wide-gamut extraction requires the specific BMP formats that support it (JPEG XL, AVIF).
Tips for Best Results
- Use batch extraction when you need a contact sheet — one BMP every 5-10 seconds gives a readable overview of any MJPEG.
- Set Advanced → scale to target your destination pixel size once in the pipeline instead of resizing the BMP later in Photoshop.
- Keep the MJPEG alongside the BMP so you can redo the extraction with different settings without re-uploading.
Frequently Asked Questions
Yes. The free tier accepts files up to 100 MB without registration, email capture or watermarks. Paid plans raise the size cap, enable batch conversions and provide a REST API for automation, but nothing on the free tier is quality-limited — the output is exactly the same as on any paid plan.
Yes. The Advanced panel accepts a timestamp in HH:MM:SS.mmm and FFmpeg seeks to that exact presentation time. You can also request the first, middle or last frame shortcuts, or a full batch (one BMP per second or per N frames).
Uploads run over HTTPS, files are processed in isolated containers, and both the source MJPEG and the BMP output are auto-deleted within two hours. No account is required, file contents are never logged, and KaijuConverter does not use uploads for AI training. The paid plan adds a signable data-processing agreement for regulated workflows.
Yes by default. The extracted frame is written at the same width and height as the source video. If you need a smaller image for the web, an Advanced "scale" option downsizes during the same pass so you do not have to re-encode twice.
Most files finish in well under a minute. Small images and documents are typically ready in a few seconds; large video or audio files scale roughly with duration. Upload speed from your network is usually the dominant factor, not server time.
Partially. We tone-map HDR MJPEG content back to SDR when the target BMP does not support wide-gamut. For proper HDR preservation pick a modern BMP that supports it natively (JPEG XL or AVIF) and leave "preserve HDR" enabled in Advanced.
Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
BMP Bitmap Format: The Complete Technical Guide
Everything about the BMP format: DIB header variants, pixel storage, color depths (1 to 32-bit), RLE compression, alpha channels, and BMP vs PNG vs TIFF.
Read guideBMP Format: Windows Bitmap Images Explained — Headers, Compression & Use Cases
Learn what BMP files are, how the Windows Device Independent Bitmap format works, supported colour depths, compression options, and when to use BMP vs PNG.
Read guideBMP Bitmap Format: Complete Technical Guide to Windows Bitmap Images
Learn BMP (Windows Bitmap): BITMAPINFOHEADER structure, pixel encoding, color palettes, RLE compression, and raster fundamentals for legacy graphics.
Read guideSecure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 60 minutes. We never read, share, or store your data.