First-party-sourced studies on how online file tools actually handle your data — privacy, architecture, and the fine print. Every claim is quoted from the source and dated.
We re-encoded four real images — a photo, a graphic, a diagram, and a logo — to every format and measured each byte. AVIF won every time (averaging 55% smaller than JPEG), but the savings ranged from 2% to 64% depending on the image.
We read the privacy policy of 8 major free PDF and image tools — Smallpdf, iLovePDF, Adobe, PDF24, CloudConvert, Sejda, Convertio, TinyPNG. All 8 upload your file to a server. The evidence, sourced.
