Built a Free Browser-Based Video Watermark Remover Entirely with Claude
vinishkapoor · reddit · 2026-08-13
A developer shared how they built a free, no-login browser tool to remove text and watermarks from videos entirely using Claude.
How Claude helped in the pipeline:
- Auto-detection logic: Wrote the canvas scanning algorithm to identify static overlays by comparing pixel consistency across frames.
- Smart Fill removal: Built an inpainting method sampling surrounding pixels to reconstruct backgrounds.
- Edge padding math: Handled pixel boundary calculations for anti-aliased letter edges for clean removal.
- UI/UX flow: Iterated on the draw-a-box interaction, resizing handles, and side panel UI.
- Video processing pipeline: Connected canvas manipulation to video export while keeping the original audio track intact.
The tool is completely free to use.
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