Fast format picks
Use JPG for normal photos, PNG for screenshots and transparency, PDF for final documents, DOCX for editing, MP3 for audio sharing, WAV for audio editing, MP4 for video uploads, and CSV or XLSX for tables.
When compatibility matters
Choose the most common accepted format first: JPG, PNG, PDF, MP3, or MP4. These formats are usually safer for forms, school portals, job applications, social platforms, and email attachments.
When quality matters
Keep the original source file. Convert copies for upload, sharing, or compatibility so you can return to the highest-quality version later.