How to remove a watermark from a Bilibili video

Watermarks on Bilibili videos come from a few places. Most often it’s Bilibili’s own uploader watermark: the bilibili logo plus the uploader’s name, burned into the top-right corner of every quality when the uploader turns it on, so it shows up in any download. Re-uploaded clips can also carry the mark of the app they came from (Douyin, TikTok, Kuaishou), and your own footage may have an old logo. If the video is yours or you have permission to edit it, here’s how to get a clean copy without installing anything.

1. Load the video

Open the video watermark remover.

• From a link: paste the bilibili.com/video/BV… or b23.tv link and press Load video. The tool picks a 720p or smaller MP4 so it fits the 100 MB limit, and downloads it straight from Bilibili to your browser.
• From a file: switch to Upload a file and drop in an MP4, MOV, WebM or MKV. It is never uploaded anywhere.

Already used the Bilibili video downloader? Its Remove a watermark link opens this tool with the video ready.

2. Line up the box

Scrub to a frame where the watermark is clearly visible and pause. Then:

• Tap the corner the logo sits in. You can select several corners if there are marks in more than one.
• Choose a box size: Tight for a small icon, Standard for a logo with a name, Wide for big combined marks.
• Or press Draw my own box and drag over the mark. Drag the box afterwards to fine-tune it.

The shaded box on the preview is exactly the area that gets edited.

3. Pick a method

Method	Best for	Result
Soft repair	Plain or slow-moving backgrounds (sky, walls, a desk)	The box is filled from its edges; often invisible
Blur	Busy or fast-moving backgrounds, large text	A frosted patch; nothing readable
Pixelate	Making it obvious that something was hidden	A block mosaic

Soft repair uses FFmpeg’s delogo filter, which interpolates the box from the pixels just outside it. It can’t know what was behind the logo, so on detailed scenes it can leave a smudge; that’s when Blur looks better.

4. Export and download

Choose Fast (quickest), Smaller file (better compression, longer wait) or More detail (least compression), then press Remove watermark. The first run downloads the 32 MB editor from jsDelivr, verified against a fixed fingerprint; later runs start straight away. On desktop Chrome, Edge and Firefox it uses several CPU cores.

When it’s done, preview the result and press Download MP4. Not happy? Adjust and export again keeps your video loaded.

Limits and tips

• Up to 5 minutes and 100 MB. Trim longer videos first.
• Output is MP4 at up to 720p and 30 fps, which keeps browser editing fast. Need the original in 4K? Get it from BiliVideoDownloader first, then edit a short clip here.
• Close other tabs on phones; browsers limit the memory one tab can use.
• Before reposting anything, read is it legal to download Bilibili videos?