The Best File Formats for Online Sharing in 2026

The wrong file format is an invisible tax on the people you share with. A HEIC photo nobody can open. A 40 MB Word document that could be a 2 MB PDF. A WAV audio file where an MP3 would do. Here's the definitive format guide for common sharing scenarios.

Documents

• PDF — the universal choice. Preserves formatting identically across all devices. Use PDF for any document intended for final delivery. Create with "Print to PDF" or export from Word/Google Docs.
• DOCX — only when the recipient needs to edit the document. Not for final deliverables.
• HTML — excellent for interactive content, reports with embedded charts, and web previews. TiniDrop renders HTML files live in the browser.

Images

• JPEG — for photos and photographic content. Lossy but efficient. Quality 80-85% is usually indistinguishable from original.
• WebP — 25-34% smaller than JPEG at same quality. Supported by all modern browsers. The new default for web images.
• PNG — for screenshots, diagrams, logos (when you need transparency or lossless quality).
• SVG — for icons, logos, and illustrations that need to scale. Infinitely scalable, tiny file size.
• AVIF — next-generation format, smaller than WebP, excellent for high-quality photos. Growing browser support.
• HEIC — avoid for sharing. Default on iPhones but not universally supported outside Apple ecosystems.

Video

• MP4 (H.264) — the universal video format. Works on every device and browser.
• MP4 (H.265/HEVC) — 50% smaller than H.264 at same quality. Supported on modern devices; avoid for old browsers.
• WebM (VP9/AV1) — best for web delivery. AV1 is the future of efficient video compression.

Archives

Use ZIP for universal compatibility. Use 7z when maximum compression matters and the recipient can handle it. TiniDrop supports ZIP site uploads — upload a ZIP of an HTML project and it's automatically hosted as a live browsable site.