How to Choose a File Format
Start with the end use
The first question is not which format is best, but where the file will end up. A photo for a print poster has different needs than the same photo embedded in a website, and a draft for a team differs from a final contract for a client.
Write down the three most important outcomes: who opens the file, what they do with it, and how long it must stay usable. This turns a vague format debate into a checklist you can apply to any pair.
Match compression to content
For photographs, a lossy format such as JPEG usually balances quality and file size, while text, logos, and screenshots benefit from lossless formats such as PNG. Audio and video follow the same rule: keep a lossless master and create compressed delivery copies.
A useful example is a company logo. Exporting it as JPEG introduces compression artifacts and removes transparency; PNG or SVG keeps the edges clean. The same logo photographed on a phone camera, however, would be wasteful as a giant lossless file.
Check compatibility and openness
Ask whether the recipient can open the file without installing software. PDF, MP4, ZIP, and JSON are near-universal; WOFF2, STL, and 7z require specific contexts. Open formats also reduce long-term risk because their specifications remain publicly documented.
For internal tools, standards such as WebP, FLAC, ODT, or glTF are often worth the compatibility work. For external delivery to unknown users, choose the most boring format that still meets the quality requirements.
Write the decision down
Teams that write a one-paragraph format policy stop re-litigating the same choice. Record the default format for each content type, the exception conditions, and the person who owns format changes.
Review the policy when browser support or tooling changes. Format decisions are rarely permanent, but they should change deliberately rather than because one person happened to export in a different extension.