ZipConvert

Is ZipConvert really free?

Yes. Every converter and tool here works without a login or payment. No watermark, no daily limit, no "please subscribe to download." Premium ($4/month) adds opt-in 7-day cloud restore and raises the per-file limit from 100 MB to 5 GB — you don't need it for normal use.

Are my files uploaded?

No. The conversion runs in your browser using a WebAssembly engine that's downloaded once and cached. Open your browser's Network tab while you convert — you'll see no outbound file traffic. The only network calls are page assets and (if you opt in) anonymous error reporting.

What's the maximum file size?

100 MB per file on the free tier, 5 GB on Premium. The real limit is your device's available memory — a phone with 4 GB of RAM will choke on a 2 GB video, regardless of plan. Desktop with 16 GB+ RAM handles almost anything.

Which formats are supported?

Over 1,000 input/output combinations across images (JPG, PNG, WebP, AVIF, HEIC, TIFF, BMP, GIF, SVG, ICO), audio (MP3, WAV, FLAC, OGG, M4A, AAC), video (MP4, WebM, MOV, AVI, MKV, GIF), documents (PDF, DOCX, DOC, MD, HTML, TXT, EPUB, MOBI), spreadsheets (CSV, XLSX, JSON, XML, YAML), and archives (ZIP, TAR, 7Z, RAR, GZ). Drop a file in — if it's not supported, we'll say so up front.

How does client-side conversion actually work?

The conversion engine — a WebAssembly build of ffmpeg, libvips, pdf-lib, and a few others — downloads to your browser the first time you visit (~30 MB, cached after). When you drop a file, JavaScript hands the bytes to the WASM module, which runs the same C/C++ code a desktop app would, but inside the browser sandbox. The output bytes come back, and the browser saves them as a download.

Can I convert PDF to Word (DOCX)?

Yes. Drop the PDF in, pick DOCX as the target. Text and basic formatting carry over. Complex layouts (multi-column academic papers, image-heavy brochures) are best-effort — that's true of every PDF-to-Word converter, including the paid ones, because the PDF format wasn't designed to round-trip back to Word.

Is there a batch limit?

Free tier: 50 files per batch. Premium: 500. The total memory cost matters more than the file count — 50 small images convert faster than 5 huge videos. The queue runs them in parallel up to your CPU's core count.

What happens to Premium files after 7 days?

If you opted into cloud restore, your converted file is encrypted client-side and stored in Cloudflare R2 for exactly 7 days. After that, it's deleted automatically — we don't keep a backup. The encryption key stays in your browser; if you lose your account, the file is unrecoverable. Don't opt in if that's not what you want.