4K upscaling. Defaults to 4K UHD (3840px long edge): gamma-correct Lanczos in linear light, then a thresholded Gaussian sharpen — crisp and halo-free. Enlarges existing detail; doesn’t invent it.

Watermark removal. Strips Gemini’s bottom-right logo with exact reverse alpha blending — lossless on known sizes, with a corner re-fit for odd dimensions. That visible mark only.

Video. Convert, trim, crop and mute (MP4 / WebM / GIF) via FFmpeg.wasm (~31 MB, fetched on first use). Must be served over http(s).

Documents. Convert DOCX · ODT · RTF · PDF · MD · HTML · TXT and XLSX · CSV · ODS both ways (PPTX import). PDF is text-only — no layout, images, or fonts survive the round trip. 100% in your browser — nothing is uploaded.

Metadata stripped. Every image export is decoded and re-encoded locally, so EXIF — GPS, camera, timestamps — is removed. Cards flag source location data.