About the KEY file format
KEY File Format (KEY) stores document or productivity content that can be rendered into a shareable image.
The guide and converter lists are generated from the live HEIC.now catalog, so every conversion shown here is an available workflow.
Why KEY files are used
KEY File Format files belong to the office and data family and use the .key extension.
The most practical format depends on the software, quality, compatibility and file-size requirements of the destination workflow.
What to know about KEY
File structure
KEY has format-specific rules for storing image, document or media data.
Quality
Conversion can change compression, colour, metadata, resolution or editability.
Compatibility
Support for KEY varies between browsers, operating systems and editing applications.
Original files
Keep the original KEY when future editing or maximum retained information matters.
How KEY conversion works
Converting KEY decodes or renders the source and then encodes the result in the selected destination format.
Review the converted file before replacing the source because format-specific features may not transfer.
heic.now accepts KEY as an input and converts it to supported outputs.
KEY compatibility and software support
Check that the receiving browser, app or service supports KEY before choosing it for delivery.
A JPG or PNG copy is often useful when broad image compatibility is the priority.
KEY and related formats
When should you use KEY?
- Sharing: Create a file the recipient can open without specialist software.
- Publishing: Prepare content for a website, app or content-management system.
- Editing: Move content into a format supported by the next editing application.
- Archiving: Keep the original and create practical access copies for everyday use.
Convert from KEY
Use KEY as the source.
KEY file format FAQ
What is a KEY file?
KEY File Format (KEY) stores document or productivity content that can be rendered into a shareable image.
Can HEIC.now convert KEY files?
heic.now accepts KEY as an input and converts it to supported outputs.
What changes when KEY is converted?
Converting KEY decodes or renders the source and then encodes the result in the selected destination format.
Should I keep the original KEY file?
Review the converted file before replacing the source because format-specific features may not transfer.