Help & FAQ
This page answers common questions when you convert documents to flashcards with Flintio AI. If something fails, work through the sections below in order—most flashcard generator not working reports come from file type, size, or network issues that are easy to fix.
Getting started
Open the home page, choose how many flashcards you want, then upload a supported file. Flintio AI reads the text and builds cards you can flip in the browser 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?
A file upload problem usually means the browser never finished sending the file or the app rejected it before processing started. Check that you are online, disable VPNs or strict browser extensions temporarily, and try another browser if the button stays stuck.
A pdf upload error can also appear when the file is actually a renamed image or a corrupted export. Open the PDF locally to confirm it loads, then upload again. If you dragged the file into another tab by mistake, select it explicitly with the file picker.
What to do: Retry on a stable connection, confirm the file opens on your device, reduce file size if possible, and try a smaller test document to verify the pipeline works.
Why are flashcards not generating?
When flashcards are not generating, the request may have reached the server but Flintio AI could not return a valid deck. That can happen if the document has very little readable text, if the session timed out, or if the service hit a temporary limit.
Flashcard generator not working symptoms include a spinner that never finishes, an error toast, or an empty result area. Note the exact message you see; it often tells you whether the problem was parsing, rate limits, or model output.
What to do: Wait a minute and try again with fewer cards, shorten the source material, or split a long file into chapters. If the app shows a parsing error, regenerate once with a simpler export of the same content.
Unsupported file format
Flintio supports PDF, DOCX, XLSX, and PPTX in this version. An unsupported file format error appears when the extension or contents do not match those types—for example, old .doc, .ppt (non-x), scanned images saved as PDF without text, or password-protected files.
What to do: Save As a modern format (.docx / .pptx / .xlsx), remove passwords, or export from Google Docs or Slides to a supported type. For image-only PDFs, run OCR or paste the text into Word and upload the .docx instead.
File too large
Large uploads fail more often on slow networks and cost more to process. If you see a file too large message, compress images inside the document, split the PDF into parts, or copy only the chapter you need into a fresh Word file.
What to do: Shrink the document, upload a subset of pages, and keep one topic per file so Flintio AI can stay within practical limits.
Processing error
A processing error means something went wrong while reading the file or building cards after upload succeeded. Causes include unusual fonts, embedded objects the extractor cannot read, or a short-lived outage upstream.
What to do: Copy plain text into a new document and upload that version, update your browser, and retry. If every file fails, check Privacy Policy and contact details in the footer so we can investigate patterns on our side.
Study tips after a successful upload
Once flashcards appear, skim for accuracy before you rely on them for exams. Flintio AI proposes cards from your source text; you remain responsible for checking facts, formulas, and names. Export to CSV if you want to move the deck into another study app.
For broader study habits, open any guide from the Learn more menu on the home page, or return to Flintio home to generate another deck from a different format.