MP4
Basics
A widely used container for H.264/H.265 video and AAC audio.
Advantages
Broad device, browser, editor, and social-platform compatibility.
Limitations
Quality can decline when a lossy MP4 is encoded again.
100% client-side processing
Video Watermark
Add a text or custom image watermark to a local video. Your video and watermark stay in your browser.
Source video
No file selected
Watermark editor
Design and place your watermark
Watermark content
Appearance and placement
%
px
Position
Choose a video to begin.
1
Choose a video
Select a local video file. It remains on your device.
2
Design the watermark
Use text or a custom image, then choose its opacity and position.
3
Download the result
Preview the watermarked MP4 and download it when ready.
Supported input formats
Video formats this tool can process
MP4, WebM, MOV, MKV, AVI, FLV, and TS are accepted. A container alone does not guarantee compatibility: the video and audio codecs inside the file must also be available in the browser's FFmpeg runtime.
WebM
Basics
A web-focused container commonly paired with VP8, VP9, or AV1 video.
Advantages
Efficient for modern web playback and royalty-free workflows.
Limitations
Some older devices and desktop editors have limited support.
MOV
Basics
Apple QuickTime's container, often used by cameras and editing software.
Advantages
Strong fit for Apple and professional production workflows.
Limitations
High-quality files can be large and less convenient outside Apple tools.
MKV
Basics
A flexible Matroska container that can hold multiple audio, subtitle, and chapter tracks.
Advantages
Useful for archives and videos with multiple languages or subtitles.
Limitations
Native playback support varies across browsers, TVs, and phones.
AVI
Basics
A legacy Microsoft container used by older Windows applications.
Advantages
Often useful for preserving or importing older media libraries.
Limitations
Files tend to be larger and are less suitable for current web playback.
FLV
Basics
A legacy Flash Video container from earlier web-video workflows.
Advantages
Helpful for converting older archives into modern files.
Limitations
Flash is deprecated and current browser support is limited.
TS
Basics
An MPEG Transport Stream container common in broadcast and HLS segments.
Advantages
Resilient for transmission and common in streaming pipelines.
Limitations
Less convenient for editing, sharing, and seeking than MP4.
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