SubZero is two free browser tools in one: remove captions/subtitles from videos, and a full PDF toolkit — merge, split, rotate, compress, watermark, extract pages, images→PDF, PDF→JPG, and more. Everything runs 100% locally in your browser (video via ffmpeg.wasm, PDFs via pdf-lib/pdf.js) — your files never get uploaded, no signup, no watermark on output. Also bilingual (English/Arabic, full RTL support
