Help & FAQ
When you are already stressed, even one upload error feels personal. This page covers the fastest fixes when Flintio will not upload, read, or generate your flashcards.
How do you get started fast?
Open the home page, choose a card count, and upload a supported file. Flintio reads the text and builds cards you can review or export. For format-specific tips, see PDF to flashcards, Word to flashcards, PowerPoint to flashcards, or Excel to flashcards.
Why is my file not uploading?
This usually means the browser never finished sending the file, or the app rejected it early. Check your connection, turn off strict extensions for a minute, and try again.
A PDF upload error can also happen when the file is really an image or a broken export. Open it on your device first, then upload again.
What to do: Retry on a stable connection, confirm the file opens, shrink it if needed, and test with a smaller file.
Why are flashcards not generating?
Sometimes the file uploads, but the deck still does not come back. That can happen when the text is too thin, the request times out, or the service hits a temporary limit.
Common signs are a spinner that never ends, an error message, or an empty result area. The exact message usually points to the real problem.
What to do: Wait a minute, ask for fewer cards, shorten the source, or split a long file into smaller parts.
How do you fix an unsupported format?
Flintio supports PDF, DOCX, XLSX, and PPTX. This error appears when the file is older, locked, image-only, or saved under the wrong extension.
What to do: Save it as .docx, .pptx, or .xlsx, remove passwords, or run OCR on image-only PDFs.
What if the file is too large?
Large uploads fail more often and take longer to process. Cut extra pages, compress images, or keep only the chapter you actually need.
What to do: Make the file smaller, upload fewer pages, and keep one topic per file.
What does a processing error mean?
A processing error means the upload worked, but something failed while reading the file or building the deck. Strange fonts, embedded objects, or a short outage can cause it.
What to do: Copy plain text into a fresh document, update your browser, and retry. If every file fails, check Privacy Policy and the footer contact options.
What should you do after a good upload?
Once the flashcards appear, scan them before you trust them for the exam. Check names, formulas, and exact facts, then export if you want the deck somewhere else.
For broader study habits, open any guide from the menu on the home page, or return to Flintio home to generate another deck from a different format.