A practical guide to converting PDF, images, and spreadsheet data

Changing the file extension is not a conversion. A useful export changes the representation while preserving the part the recipient needs. Start with the destination’s accepted formats and ask which information must survive.

Decide what to keep

Source and goal	Start with	Check the output
Several phone photos as one attachment	JPG to PDF	Page order and legibility
A HEIC image for a JPG-only form	HEIC to JPG	Dimensions, orientation, and size
Text from a selectable PDF	PDF to Text	Reading order and characters
Spreadsheet rows for an API	CSV to JSON	Header names, identifiers, and field types

Try a small copy first

For a spreadsheet export, convert a few representative rows before processing the full file. Include a quoted comma and an identifier with leading zeros. Check how the output represents them. For a document, choose one page with a table or notes. Opening the finished file on the target device tells you more than trusting an extension.

For an image, keep the original and compare exports at the same dimensions before deciding based on bytes. Image Converter is useful when format is the main decision. If the image also needs a new shape, crop first so you can check the final subject position.

Avoid needless passes

Repeatedly converting a lossy image can reduce detail. Keep a master copy and generate each requested export from it. If the destination already accepts the source format, check whether conversion solves a real problem. A well-formed original may be easier to read and maintain.

See PDF text recovery for scanned pages and the CSV conversion walkthrough for field types.