Convert WK3 to HEIC
Convert WK3 to HEIC online: every Lotus 1-2-3 sheet printed as a formatted grid, saved as a HEIC image. Free, no sign-up.
Drop your WK3 files here
Up to 50MB per file.
Conversion Settings
Files are encrypted and auto-deleted after conversion
How to Convert
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Upload your WK3 files
Drag and drop or select WK3 files from your device. You can upload multiple files at once.
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Configure Output
Choose any available HEIC output options, then start the conversion.
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Download HEIC files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert WK3 to HEIC?
A WK3 file is a Lotus 1-2-3 Release 3 worksheet, the version that introduced several sheets stacked in one file. The HEIC shows the worksheet's cells as LibreOffice Calc prints them, with calculated values, number formats and text laid out in rows and columns, sheet by sheet.
HEIC uses High Efficiency Image Coding, the format iPhones and iPads save photos in, so the image is compact while staying sharp.
Frequently Asked Questions
How do I convert WK3 to HEIC?
Drop your WK3 file above and press Convert. Our servers open the Lotus worksheet in LibreOffice Calc, print every sheet to a PDF and render each page as an image. The result is saved as a HEIC image, ready to download.
Is every sheet of a multi-sheet WK3 included in the HEIC?
Yes. Release 3 files can hold several sheets, and each one is printed in turn, so all of them appear in the HEIC pages.
Do Lotus @ functions in a WK3 show their results in the HEIC?
Yes. LibreOffice Calc reads Lotus formulas such as @SUM and @AVG, and each cell prints its calculated value.
What happens when a WK3 file fills several HEIC pages?
Each page is rendered at 144 dpi and saved as its own HEIC image, named page-1, page-2 and so on, and they download together as one ZIP. A single page downloads as one HEIC file.
How compact is the HEIC made from a WK3 file?
HEIC uses High Efficiency Image Coding, which typically needs about half the space of a JPG of similar quality, so even detailed pages stay small.
Is my .wk3 file kept private?
Your file is uploaded over an encrypted connection, converted on our servers and deleted automatically within 24 hours. We never read, share or keep your files, and no account is needed.