File Format Glossary

Learn what PDF files are used for, when to choose PDF, and which free PDF tools help with conversion, compression, merging, and splitting.

Understand JPG image files, photo compression, website use cases, and when to convert JPG to PDF, PNG, or WebP.

Learn when to use PNG images for transparency, screenshots, logos, and when to convert PNG to JPG or WebP.

Learn why WebP images are used for speed, when compatibility matters, and how to convert WebP to JPG.

Understand iPhone HEIC photos, compatibility problems, and when to convert HEIC to JPG.

Learn what DOCX files are, when to keep documents editable, and when to convert Word documents to PDF.

Learn how SVG vector files work for logos, icons, and illustrations, and when to export SVG to PNG.

Understand MP4 video files, compatibility, compression, and when to extract MP3 audio from MP4.

Learn why MOV videos are common on iPhone, iPad, and Mac devices, and when to convert MOV to MP4.

Understand older AVI video files, compatibility limits, and why converting AVI to MP4 helps modern sharing.

Learn how MKV video containers work, why they are flexible, and when to convert MKV to MP4.

Learn why WebM videos are used on websites, where compatibility can break, and when WebM to MP4 helps.

Learn why MP3 is used for audio sharing, podcasts, voice notes, and extracting sound from video.

Understand CSV files for spreadsheets, imports, exports, reports, and converting JSON data to CSV rows.

Learn what JSON is, why developers use it, and how to format, validate, or convert JSON to CSV.

Learn how Base64 encoding works for text, images, data URIs, APIs, and developer debugging.

Learn what QR codes are used for, how they work, and how to create QR codes for links, menus, cards, and WiFi.

Understand ZIP archives, compression, file packaging, and when archive tools help organize downloads.

Learn how GIF files work for simple animation, memes, previews, and when video or WebP may be better.