Format comparisons

Each comparison puts the formats side by side on the criteria that matter for uploads, sharing and storage, then tells you which to pick for common situations.

• JPG vs PNG vs WebP vs HEICCompare JPG, PNG, WebP and HEIC on size, quality, transparency, browser and portal support, and pick the right one for uploads, websites, screenshots or photos.
• MP4 vs MOV vs WebMMP4, MOV and WebM compared on codecs, compatibility, file size and where each is accepted, with a decision list for WhatsApp, email, websites and iPhone video.
• MP3 vs AAC vs Opus vs WAVMP3, AAC, Opus and WAV compared on quality per bitrate, file size, compatibility and typical uses, with a decision list for voice notes, music and archiving.
• PDF vs JPG for document uploadsWhen to upload a scanned document as PDF and when as JPG: multi-page files, size limits, text search and portal rules, with a decision list for visas and jobs.
• Lossy vs lossless image compressionHow lossy and lossless image compression differ, how much each saves, when quality suffers, and which to use for photos, screenshots, logos and portal uploads.
• JSON vs CSV vs XMLJSON, CSV and XML compared on structure, size, readability, tooling and typical uses, with guidance on spreadsheet exports, APIs and document exchange.