Video to MJPEG Converter

How to Convert Video to MJPEG Online

1. Upload Your Video File: Drag and drop your video into the upload area, or click "+ Add Files" to browse. We accept MP4, MOV, MKV, AVI, WebM, FLV, WMV, HEVC, MTS/M2TS, 3GP, OGV, and 30+ other source formats. Batch uploads work — all files convert with the same settings.
2. Pick Quality Preset: The Video Codec is locked to MJPEG (the only codec the .mjpeg container carries). Set Quality Preset to Very High (default, near-lossless intraframe — large files), High, Medium, or Low depending on your downstream tool's tolerance for file size. Need bit-exact frames for forensic or scientific work? Leave it at Very High.
3. Resolution and Trim (Optional): Use Resolution Percentage to scale (50% halves both dimensions), pick a Preset Resolution (768p, 1080p, etc.), or enter exact Width × Height. Under Trim, switch from Unchanged to Time Range and set Start and Duration to cut a clip — useful when you only need a few seconds for a frame-grab workflow.
4. Convert and Download: Click "Convert." Files process on our servers and download as .mjpeg (raw Motion JPEG stream). No sign-up, no watermark, no file count limit.

Why Convert Video to MJPEG?

Motion JPEG stores each video frame as an independent JPEG image — no inter-frame prediction, no P-frames or B-frames, no GOP structure. That gives you frame-accurate seeking and editing at the cost of significantly larger files than H.264 or H.265. Per the Motion JPEG specification history, there is no single universal MJPEG container standard; the codec rides inside AVI, QuickTime (.mov), .mjpeg raw streams, or RTP. Typical compression ratio is around 1:20, versus 1:50 or better for H.264 — expect a 100 MB MP4 clip to balloon to 250–500 MB as MJPEG depending on resolution and quality.

• Frame-accurate non-linear editing — Every frame is a keyframe, so cuts in Avid, Premiere, Final Cut, or DaVinci Resolve land on the exact frame without re-encoding neighbours. This is why MJPEG persists as an intermediate format in semi-pro post-production workflows.
• Forensic and surveillance review — Law enforcement and security teams extract still images from MJPEG for license-plate capture (LPC), facial ID, and evidentiary screenshots without GOP smearing or P-frame artifacts. H.264 dominates new surveillance hardware, but legacy IP cameras and analytics pipelines still ingest MJPEG.
• Machine vision and embedded systems — Low CPU decode cost makes MJPEG viable on Raspberry Pi, microcontrollers, and embedded ARM boards without hardware H.264 acceleration. Industrial cameras (Basler, FLIR, IDS) commonly stream MJPEG over USB or GigE Vision.
• Medical imaging and scientific capture — Endoscopy, ultrasound, and laboratory high-speed cameras prefer MJPEG for frame integrity. Each frame can be archived as a JPEG for DICOM-adjacent workflows or measurement extraction.
• Webcam streaming and MJPEG-over-HTTP — Many USB webcams and IP cameras expose MJPEG as their native UVC stream. Browsers can display MJPEG-over-HTTP via <img src="..."> because each frame is just a JPEG, which is why old-school IP camera viewers "just work."
• Game-console capture and legacy archive — Older PlayStation, Camcorder MOD/TOD files, and AVCHD intermediates store MJPEG for editability before final delivery encoding.

MJPEG vs H.264 — Codec Comparison

Quality Preset Guide

Frequently Asked Questions

Why is my MJPEG output 5× the size of the source MP4?

That is expected and not a bug. H.264 uses motion-compensated prediction between frames (P and B frames) to avoid storing redundant pixel data, while MJPEG stores every frame as a complete JPEG. For 30 fps 1080p video, that means roughly 30 independent ~150–300 KB JPEGs per second of footage. The trade-off buys you frame-accurate editing and zero inter-frame artifacts — if file size matters more than per-frame integrity, convert to MP4 or MOV instead.

What software plays a .mjpeg file?

VLC opens raw .mjpeg streams on Windows, macOS, and Linux. QuickTime Player plays MJPEG inside .mov containers. Most professional NLEs (Premiere Pro, Final Cut Pro, DaVinci Resolve, Avid Media Composer) import MJPEG natively because it has been a post-production intermediate format for decades. Browsers can display MJPEG-over-HTTP via <img> tags, which is how many IP camera web interfaces still preview live video.

Should I use the .mjpeg raw extension or wrap MJPEG in AVI or MOV?

Raw .mjpeg has no audio track and no timing metadata beyond what the consumer infers — fine for analysis pipelines and machine vision, awkward for general playback. AVI-wrapped MJPEG carries audio (PCM or MP3) and timing, which is the format most older camcorders produced. MOV-wrapped MJPEG is the QuickTime variant favoured by Apple-native editing. If you need audio, choose MJPEG inside AVI or MOV instead of raw .mjpeg.

Does the conversion preserve my source audio?

Raw .mjpeg has no standard audio track, so audio is dropped when you output to the .mjpeg extension. If audio matters, wrap MJPEG inside MOV or AVI — those containers support PCM, MP2, or MP3 audio alongside the MJPEG video stream. The default audio codec when MJPEG rides in those containers is MP3.

Is MJPEG still used in security cameras in 2026?

H.264 and H.265 dominate new surveillance hardware because they cut bandwidth and storage by 5–10×. MJPEG is still common on legacy IP cameras, embedded vision systems, and as a secondary stream for mobile/browser previews where decode simplicity matters. Some forensic analysts also prefer MJPEG for license-plate or facial-recognition review because every frame is a clean keyframe with no motion-compensation smearing.

Can I extract individual JPEG frames from the output?

Yes — that is one of MJPEG's main advantages. Any tool that demuxes JPEG byte streams (ffmpeg, custom scripts looking for the JPEG SOI/EOI markers FF D8 and FF D9) can split a .mjpeg file into per-frame .jpg images without re-encoding. If you only need stills and not a video file, our Video to JPG tool extracts frames directly.

Will MJPEG play on iPhone, Android, or in Chrome's <video> tag?

Not reliably. iOS and Android system players generally do not decode raw .mjpeg streams via the standard video element, and <video> tag support is inconsistent across Chrome, Firefox, and Safari for the .mjpeg MIME type. MJPEG-over-HTTP via <img> works in every browser (because each frame is a JPEG), but for normal video playback on phones, convert to MP4 — H.264-in-MP4 plays natively everywhere.

How do I make the output file smaller without changing format?

Three levers: drop the Quality Preset from Very High to High or Medium (biggest win — roughly halves the file at High), reduce resolution with Resolution Percentage or a Preset Resolution (1080p → 720p cuts data by ~2.25×), or trim the clip to only the seconds you need. Combining all three on a 1080p clip can shrink the MJPEG output by 5–8× while still being editable frame-by-frame.

Why does the .mjpeg file look like a single huge JPEG when I open it?

A raw .mjpeg stream is literally a sequence of complete JPEG images concatenated end-to-end with no container metadata. Image viewers that don't understand the format often only render the first frame. Use VLC, ffmpeg, or a proper NLE to see motion. If you need a container that image viewers ignore but video players handle, output to MOV or AVI instead.