Resizo

Free · No sign-up · No watermark of ours

Add a watermark to your video.
Keep the video yours.

Drop a clip, drag your logo or text onto the frame, choose when it shows, and export an MP4. Your video is re-encoded in this tab — it is never uploaded, and nothing of ours is stamped on it.

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How to add a watermark to a video

  1. 01

    Drop your video in

    MP4, WebM or MOV, up to 500 MB. It is read straight off your disk — there is no upload.

  2. 02

    Place your mark

    Add text or a logo, then drag it onto the frame. Resize from a corner, rotate from the handle, set the opacity.

  3. 03

    Time it

    Drag either end of the mark’s bar on the timeline to decide when it appears and when it goes.

  4. 04

    Export the finished video

    Pick a resolution and press Export. You get an MP4 with your audio intact and no branding of ours.

The Resizo video watermark editor with a clip loaded: a “© NORTHLIGHT STUDIO” text mark dragged to the lower right of the frame with its selection handles showing, the layer list on the left, the mark’s bar on the timeline below the video, and the watermark settings panel on the right.
The mark goes where you drag it, and the bar under the frame is the window it appears in. Everything in this screenshot is running in a browser tab — the clip was never uploaded.

What you see is what gets encoded

The preview is not the video element with a mark floating over it — it is a canvas, drawn by exactly the same code that draws every exported frame. That is deliberate: the one thing a watermark tool must never do is put the mark somewhere other than where you placed it, and the only way to guarantee that is to have a single renderer with nothing to disagree with. Rotation, tiling and opacity all behave in the file precisely as they did on screen.

Why it is fast where it can be

Compositing video in a browser used to mean a WebAssembly encoder running at a fraction of real time. Here the browser’s own hardware video encoder does the frames and a WebAssembly build of FFmpeg only builds the container and re-encodes the audio — a fraction of a second either side. Where no such encoder is available the tool falls back to recording the canvas, which runs at normal playback speed and says so before it starts rather than looking like a hang.

What’s different here

Every widely-used free online video editor stamps its own logo on a free-tier export and charges a monthly subscription to take it off. On a watermarking tool, that is the whole job undone.

Resizo compared with typical free online video editors
  Typical free editor This tool
Its own logo on your export Usually, on the free plan Never
Uploads your video to a server Almost always No — encoded on your device
Account required Usually No
Export minutes or file-size cap Common on free tiers Only your browser’s memory
Watermark timing Often whole-video only Per mark, on a timeline

Last reviewed: August 2026. Based on the published free tiers of widely-used online video editors as of August 2026. Free-tier terms change — check the current pricing page of any tool you are comparing.

Everything in the editor

Text and logo marks

Thirteen fonts with outline, shadow, tracking and a box behind the text, or a transparent PNG logo. Stack as many as you need.

Free positioning

Drag anywhere on the frame, resize from a corner, rotate with 15° snapping. Position is stored relative to the frame, so it survives an export at a different resolution.

Timeline windows

Each mark gets its own bar. Drag the ends to set start and end. Duplicate a mark for a second appearance later in the clip.

Tiled patterns

Repeat a mark across the frame with independent spacing and its own rotation — much harder to crop out than a corner logo.

Audio kept

The original soundtrack is carried into the export and re-encoded to AAC in the same pass that builds the container. Turn it off with one checkbox.

Real progress and cancel

Named stages with a real percentage, a working cancel button, and a warning up front when a clip is long enough that the export will take a while.

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Video watermark FAQ

Does this add its own watermark to my video?

No. Only the mark you place appears in the export. Most free online video editors stamp their own logo or a “made with” label on free-tier exports and charge a monthly fee to remove it — there is no paid tier here to unlock.

Is my video uploaded to a server?

No. The video is decoded, composited and re-encoded in this browser tab, using the browser’s own video encoder and a WebAssembly build of FFmpeg for the final container. Nothing is sent anywhere, which is also why a long export depends on your computer rather than on a queue.

How do I add a watermark to a video for free without an account?

Drop your video in, add a text or logo mark, drag it where you want it on the frame, and press Export. There is no sign-up, no email and no watermark of ours on the result.

Can I make the watermark appear only for part of the video?

Yes. Every mark has its own window on the timeline — drag either end to set when it appears and disappears. For a mark that appears more than once, duplicate it and give the copy a second window.

Will watermarking reduce my video quality?

Adding a watermark means the video has to be re-encoded, so there is some generational loss — that is true of every tool, including desktop ones. Exporting at the original resolution and High quality keeps it invisible in practice. Only a trim with no other change can avoid re-encoding entirely.

What formats and sizes can I use?

MP4, WebM and MOV go in, up to 500 MB and 10 minutes. MP4 with H.264 comes out. A WebM produced by the fallback recorder path stays WebM, because a VP9 stream cannot be rewrapped as MP4 without a second re-encode.

Does the exported video keep its audio?

Yes, unless you turn it off. The original audio track is copied across and re-encoded to AAC in the same pass that builds the MP4 container.

Why does the export take a while?

Every frame is composited and re-encoded on your own machine. Where your browser exposes a hardware video encoder — Chrome and Edge do — this runs several times faster than real time. Where it does not, the fallback records the canvas at normal speed, so a two-minute video takes about two minutes.

Watermarking photos instead? The image watermark tool uses the same editor and adds batch processing, so one setup can be applied to a whole folder and downloaded as a ZIP.

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