Add Watermark to Video performs add watermark to video as a focused single-page utility. Add a text or image watermark to any video. Pick the position (top-left, top-right, bottom-left, bottom-right, or center), opacity, margin, and size. Files are processed entirely in your browser with FFmpeg WebAssembly. Defaults are tuned for the common case so the first run is one click, with every option that matters exposed for the moments you need to fine-tune the result.
Add Watermark to Video runs on FFmpeg compiled to WebAssembly — an open-source, well-audited engine that performs the video editing and conversion natively in the browser. It accepts MP4, WebM, MOV, MKV, AVI, FLV, and OGV and produces output that opens in any standard video viewer. Per-run input is capped at 500 MB.
Common audiences for Add Watermark to Video include event organisers sharing highlight footage and product teams shipping release demos, but plenty of people land on the page through a one-off search and never come back — that is also fine. The tool is built to be useful even when you only ever need it once.
The execution model is straightforward: your file is bytes in the tab's memory, the engine reads those bytes, computes the result, and hands the result back to the browser. The transformation happens locally, which is why the tool keeps working when your network connection drops mid-job and why it produces the same result every run for the same input.
Reach for Add Watermark to Video when you need a predictable result on a single file. The page works on the first visit, the controls are visible without a menu, and the output is delivered the moment the engine finishes.
When the job finishes, Add Watermark to Video hands you the result as `{name}-edited.{ext}`. Filenames are derived from your input where possible, so a quick batch of jobs leaves you with a tidy folder rather than a pile of generic "output (3)" files. Nothing is auto-saved on Favtoo's side because nothing was ever sent there.
Constraints worth knowing about: inputs are capped at 500 MB to keep memory usage in a sensible range, one input is processed per run, and the tool must be loaded over HTTPS for the in-browser engine to work. These are properties of the architecture.
As a workflow component, Add Watermark to Video is the part you reach for when a single, well-defined video editing and conversion step needs to happen. It performs that step and returns a standard file you can carry into the next part of your pipeline.
Some notes on the design of Add Watermark to Video. The page is intentionally narrow: one input, the controls relevant to the task, and one output. Adding unrelated features would make the common case slower for the majority of users, so the surface is held to what people actually use.
Add Watermark to Video is one example of a broader pattern: utility software increasingly works as single-page, client-side experiences. Every page in the catalog is shaped that way, which keeps each tool fast to load and easy to recommend in a single link.
Add Watermark to Video is built around the moment of need: a focused page you open when you have a specific task, complete the task, and close. The catalog contains many adjacent tools so the same model serves the surrounding parts of a typical video editing and conversion workflow.
Useful patterns when working with Add Watermark to Video: keep the input file open in another tab so you can compare against the result; give the output file a descriptive name when saving so you can find it later (the default name is sensible but generic); and treat each run as independent — the tool has no concept of "history", which means you cannot accidentally pollute one job with leftovers from another.
If Add Watermark to Video appears to hang, the engine is almost certainly still working — large inputs simply take longer to process inside a browser than they would on a server with multi-core scheduling. For inputs near the 500 MB cap, give it up to a minute on a typical laptop before assuming something is stuck.
That is the whole tool. Use Add Watermark to Video for as long as it stays useful to you, and if it does, the catalog has many more tools built the same way. Each applies the same single-purpose discipline, so the way you used this page transfers to the next one you try.
A WebAssembly build of FFmpeg loads in this page. For text watermarks the text is rendered to a transparent PNG using the browser canvas, then composited over your video using FFmpeg's overlay filter. For image watermarks your logo is composited directly. Everything runs on your device.
Watermarking re-encodes every video frame with the overlay applied. Server tools have native multi-threaded FFmpeg with hardware acceleration; the WebAssembly build is single-threaded and typically 4–8× slower. The trade-off is total privacy — your video and logo never leave your device.
Text mode lets you type any text and pick the size and color — perfect for "© Your Brand 2026". Image mode uses your uploaded logo (PNG, JPG, or WebP). Transparent PNGs work best because only the logo pixels show over the footage.
Yes — the opacity slider controls how transparent the watermark is. 100% is fully solid, 30–50% is the typical "subtle brand stamp" look, and 10–20% is a barely-there discouragement to re-uploaders.
For image watermarks the size is set as a percentage of the video width. 15–20% is the standard for a corner brand stamp. 40–60% is for prominent watermarks meant to discourage redistribution.
Up to 500MB. Watermarking is one of the slower operations because every frame is re-encoded — expect roughly real-time processing on a modern desktop, slower on mobile.
No. The audio stream is copied without re-encoding, so it is identical to the original. Only the video is re-rendered with the watermark added.
No. The watermarking runs entirely in your browser tab. Nothing is transmitted, stored, or logged. Closing the tab erases the file from memory immediately.
No installation is needed. Add Watermark to Video runs as a normal web page, with no browser extension, no native helper, and no separate desktop client to download. That is partly a privacy choice — extensions can request broad permissions, while a regular page is sandboxed by default — and partly a convenience one: you can use Add Watermark to Video on any computer you have temporary access to without leaving anything installed on it.
Add Watermark to Video is a static page running an open-source engine in your browser, so a typical corporate firewall does not get in the way as long as it allows JavaScript and WebAssembly to load from Favtoo. For teams that need to host it themselves on an internal network, the underlying engine (FFmpeg compiled to WebAssembly) is open-source and can be packaged into a private build with the same behaviour. Reach out via the Contact page if that is something you are exploring.
Once the page is loaded, Add Watermark to Video can complete jobs without an active internet connection — the engine is bundled with the page, so there is no per-job network call. The initial page load does require a connection (to fetch the static assets), but after that you can disconnect entirely and the tool will still work. This is a side-effect of the local-first architecture, not a deliberate "offline mode" feature.
Add Watermark to Video is free to use. The processing runs in your browser, which keeps the per-user cost low enough that the tool can be offered openly. The download is the same file the engine produced — you can use it for as many runs as you need.
Desktop apps usually have more advanced features but require installation, maintenance and (often) a licence. Paid online tools are convenient but route your file through their servers and gate downloads behind accounts. Add Watermark to Video sits in between: free, instant, and private, but intentionally narrow in scope. For one-off jobs and the common video editing and conversion operations, it is usually the lowest-friction choice; for highly specialised work, a dedicated app is still the right answer.
Add Watermark to Video runs in any modern mobile browser — Safari, Chrome, Firefox and the in-app browsers in most messaging apps all support the underlying APIs. Performance depends on the device: a recent phone handles typical inputs nearly as fast as a laptop, while older devices may take a few seconds longer near the 500 MB ceiling. The interface lays out cleanly on small screens, so you do not need to pinch-zoom to see the controls.
Your file is processed inside your browser by FFmpeg compiled to WebAssembly. The engine reads the file's bytes from your tab's memory, computes the result, and writes the result back into the tab. You can confirm what the page does by opening developer tools and watching the Network tab during a run — the requests you see are for the tool's static assets only.
Video to GIF
Convert any video clip to an animated GIF entirely in your browser. Pick the start, length, frame rate, and width — your file is processed locally with FFmpeg WebAssembly and never uploaded.
Screen Recorder
Record your screen, a window, or a browser tab directly in your browser. Optionally include system audio and your microphone. Capture, preview, and download the video without installing any app — and without uploading anything.
Webcam Recorder
Record your webcam directly in your browser with optional microphone audio. Pick the resolution (480p, 720p, or 1080p), frame rate, and mirror mode, then capture and download the result without installing any app.
Screen + Webcam Recorder
Record your screen with your webcam composited into a picture-in-picture corner — perfect for tutorials, course videos, demos, and reaction recordings. Pick the camera position, size, and audio sources, then capture and download in your browser.
Video Slideshow Maker
Turn a stack of photos into an MP4 slideshow with per-slide durations, crossfades, and an optional soundtrack. Pick the resolution (up to 1080p), frame rate, and transitions, then download a single MP4 — all processed in your browser with FFmpeg WebAssembly.
Video from Images + Audio
Combine a stack of photos with a music track or narration into a single MP4 video. Pick the resolution, per-slide duration, transitions, and let the slideshow length match the audio. All processed in your browser with FFmpeg WebAssembly.
Video Trimmer
Set precise in and out timestamps, snap to keyframes when needed, and document handles for social-safe cutdowns.
Video Splitter
Split any video into 2–10 equal-length pieces, packaged as a downloadable ZIP. Files are processed entirely in your browser with FFmpeg WebAssembly using lossless stream-copy.