Split a big PDF into parts that fit.
Pages stay in order, and each part stays under the size you choose. Canva-safe mode locks every page as one picture so Canva cannot fade, move or re-type the content. Everything runs in your browser.
Parts are kept slightly under this, so they fit limits on WhatsApp, email and upload sites.
What happens to your slides
With "text as shapes", pages are exact copies except for the text, which is redrawn as the letter shapes stored in the PDF's own fonts. Editors such as Canva replace real text with their own fonts when importing, which changes letters and moves lines; shapes cannot be re-typed. This works for the fonts that Canva, Chrome and Google tools put into PDFs. Pages with other kinds of font keep their ordinary text.
With "Locked pictures", each page is drawn the way a PDF viewer shows it and saved as a single picture. Nothing on it can be moved or re-typed, but text becomes part of the picture and is less sharp when zoomed. The rest of this section is about the exact copy.
Each page is moved into a new file with its fonts and graphics byte-for-byte identical, and its pictures too unless sharpening changes them. If several slides share an image or font, each part gets its own copy, so every part opens on its own.
Each part also keeps the document's layer settings and colour profile, so hidden layers stay hidden and colours look the same as in the original.
"Smooth pictures when zoomed in" adds a mark to each picture that tells the viewer to blend its pixels when enlarging, instead of drawing them as squares. It changes nothing in the picture itself.
"Sharpen blurry pictures" changes the pictures themselves. Light sharpens edges in pictures stored below 200 dots per inch and keeps their size, format and transparency, so nothing gets heavier and nothing moves. Strong and Maximum also enlarge those pictures to about 220 or 300 dots per inch and save them as high-quality JPEG: sharper at high zoom, but heavier to scroll, zoom and edit. No level adds real detail. For truly sharp slides, export them at a higher resolution before splitting.
A single slide bigger than your limit can't be split further without changing it. It gets a part of its own, marked in orange.