Question 1

What is Merge PDF and what is it for?

Accepted Answer

Merge PDF lets you combine multiple PDF files into a single document. Useful when you have several separate files — like scanned pages, invoices or reports — and want to make one cohesive file. Just drag and drop files, set their order and click "Merge". Everything works locally in your browser.

Question 2

What is Split PDF and what is it for?

Accepted Answer

Split PDF lets you divide one document into smaller parts. You can choose the mode: every N pages, page ranges (e.g. 1-5, 8, 10-15) or select specific pages to extract as separate files. Useful when you need only selected fragments from a large document.

Question 3

What is Compress PDF and what is it for?

Accepted Answer

Compress PDF reduces file size, making it easier to email or store. The tool offers three compression levels: Low (minimal compression, best quality), Recommended (good balance of size and quality) and Extreme (maximum reduction, lower quality). All images in the PDF are optimized and unnecessary data removed — all locally, no server upload.

Question 4

What is Rotate PDF and what is it for?

Accepted Answer

Rotate PDF lets you change the orientation of selected pages — by 90°, 180° or 270°. Useful when you scanned a document and some pages are rotated, or when merging documents in different orientations. You can also save all pages as a ZIP file.

Question 5

What is Crop PDF and what is it for?

Accepted Answer

Crop PDF lets you trim a selected area from each page. You can choose which pages to crop, set margins (left, right, top, bottom) and preview the result before saving. Useful for removing white margins, footers or headers from a document.

Question 6

What is Delete Pages and what is it for?

Accepted Answer

Delete Pages lets you select and remove unwanted pages from a document. Mark the page thumbnails you want to delete and the rest will be saved as a new file. Useful for removing blank pages, ad pages or unnecessary sections.

Question 7

What is Extract Pages and what is it for?

Accepted Answer

Extract Pages lets you select specific pages from a PDF and save them as a separate file. Unlike splitting, you don't remove the original pages — you create a new document with copies of selected pages. Useful when you need only a specific chapter from a book or a few pages from a contract.

Question 8

What is Reorder Pages and what is it for?

Accepted Answer

Reorder Pages lets you drag page thumbnails to arrange them in any order. Useful when you scanned a document in the wrong order, glued pages out of sequence or want to rearrange pages before the final save.

Question 9

What is Add Page and what is it for?

Accepted Answer

Add Page lets you insert a blank page into an existing PDF. You can choose the format (A4, Letter, etc.) and orientation (portrait/landscape). The page is added at the end of the document. Useful when you need a section for notes or to separate document parts.

Question 10

What is Edit PDF and what is it for?

Accepted Answer

Edit PDF lets you add text and rectangles on any page of the document. You can choose the font, color, size and position. Useful for filling forms, adding annotations, covering text fragments or completing missing information in a document.

Question 11

What is Page Numbers and what is it for?

Accepted Answer

Page Numbers lets you add page numbers to a PDF document. You can choose the position (top/bottom), alignment (left/center/right), numbering style and starting page. Useful for professional formatting of documents, reports and presentations.

Question 12

What is Watermark PDF and what is it for?

Accepted Answer

Watermark lets you add a text watermark (e.g. "CONFIDENTIAL", "DRAFT") to every page of a PDF. You can set opacity, color, size, rotation angle and position. Useful for marking documents before sharing.

Question 13

What is Redact PDF and what is it for?

Accepted Answer

Redact PDF lets you permanently remove (cover with a black rectangle) selected text fragments on a page. Unlike simple painting over, the data is physically removed from the file. Useful for anonymizing personal data, hiding confidential information before sharing a document.

Question 14

What is Flatten PDF and what is it for?

Accepted Answer

Flatten PDF merges all layers, annotations and form fields into a single static layer. After flattening, text cannot be edited nor fields filled — everything becomes a "flat image". Useful for finalizing a document before sending so nobody can alter its content.

Question 15

What is PDF Metadata and what is it for?

Accepted Answer

Metadata editing lets you view and change information about a PDF file, such as title, author, subject and keywords. This data is visible in file properties and affects search results. Useful for categorizing documents and improving file organization.

Question 16

What is PDF to Word and what is it for?

Accepted Answer

PDF to Word converts a PDF file to DOCX format, editable in Microsoft Word, LibreOffice or Google Docs. Useful when you received a PDF and need to edit its content — change text, fix an error or add your own sections.

Question 17

What is Word to PDF and what is it for?

Accepted Answer

Word to PDF converts a DOCX document to a PDF file that looks identical on every device. Useful before sending a document — PDF preserves formatting, fonts and layout regardless of where it is opened.

Question 18

What is Images to PDF and what is it for?

Accepted Answer

Images to PDF converts JPG, PNG and WebP images into a PDF file. You can combine multiple photos into one document, set their order and choose page orientation. Useful for scanning documents with your phone and combining photos into a single PDF.

Question 19

What is PDF to Images and what is it for?

Accepted Answer

PDF to Images converts each PDF page into a separate image in JPG, PNG or WebP format. You can choose format, resolution and quality. Useful when you want to share a single page from a document, insert it into a presentation or publish on social media.

Question 20

What is PDF to Excel and what is it for?

Accepted Answer

PDF to Excel converts tables and data from a PDF file to XLSX format. Useful when you received a report in PDF and want to further analyze it in a spreadsheet — sort, filter or perform calculations on the data.

Question 21

What is Excel to PDF and what is it for?

Accepted Answer

Excel to PDF converts an XLSX spreadsheet to a PDF file. Useful before sharing financial data or reports — PDF looks the same on every device and cells cannot be accidentally changed.

Question 22

What is PDF to PowerPoint and what is it for?

Accepted Answer

PDF to PowerPoint converts PDF pages into slides in PPTX format. Each PDF page becomes a separate slide. Useful when you have a presentation in PDF and want to edit or customize it in PowerPoint.

Question 23

What is OpenOffice to PDF and what is it for?

Accepted Answer

OpenOffice to PDF converts ODT (Writer), ODS (Calc) and ODP (Impress) documents to PDF format. Useful for LibreOffice and OpenOffice users who want to share their documents in the universal PDF format.

Question 24

What is PDF to OpenOffice and what is it for?

Accepted Answer

PDF to OpenOffice converts a PDF file to ODT format, editable in LibreOffice Writer or OpenOffice Writer. Useful when you use free office suites and need to edit content from a PDF file.

Question 25

What is PDF to TXT and what is it for?

Accepted Answer

PDF to TXT extracts all text from a PDF file and saves it as a plain text file. It loses formatting but you get clean, easy-to-process text. Useful for data analysis, copying content or use in other programs.

Question 26

What is PDF to SVG and what is it for?

Accepted Answer

PDF to SVG converts each PDF page into a scalable SVG (vector) file. Unlike JPG, SVG can be enlarged without quality loss. Useful for designers and graphic artists who need to further edit page content in programs like Illustrator, Inkscape or Figma.

Question 27

What is PDF to EPUB and what is it for?

Accepted Answer

PDF to EPUB converts a PDF document to EPUB format, commonly used in ebook readers (Kindle, PocketBook, Kobo). Text adapts to screen size, making reading easier on small devices. Useful when you want to read a PDF on an ebook reader in a more comfortable format.

Question 28

What is HTML to PDF and what is it for?

Accepted Answer

HTML to PDF converts webpage code into a PDF file. Paste HTML code or provide a page URL. Useful for archiving web pages, saving articles for offline reading or generating reports from HTML code.

Question 29

What is URL to PDF and what is it for?

Accepted Answer

URL to PDF lets you save a webpage as a PDF file by providing its URL. Useful for archiving articles, saving instructions or documentation for offline reading. Note: this function requires a server connection (not fully local).

Question 30

What is PDF to HTML and what is it for?

Accepted Answer

PDF to HTML converts PDF pages into HTML code. Useful when you want to publish PDF content on a website, blog or CMS without manually rewriting it.

Question 31

What is Protect PDF and what is it for?

Accepted Answer

Protect PDF lets you set a password to open the document — without it, nobody can read the file. You can also add a permissions password that restricts printing, copying and editing. Useful for sending confidential documents by email or storing sensitive data.

Question 32

What is Unlock PDF and what is it for?

Accepted Answer

Unlock PDF removes the password and restrictions from a secured PDF file. Works for both the open password and permissions password. Useful when you know the password to your PDF and want to remove protection to freely edit or print the document.

Question 33

What is Sign PDF and what is it for?

Accepted Answer

Sign PDF lets you add a handwritten signature (drawn with mouse or finger) or a text signature on a selected page. You can also add the date and quick positions. Useful for signing contracts, applications and other documents without printing and scanning.

Question 34

Does OptimaPDF have access to my files in Google Drive/OneDrive/SharePoint?

Accepted Answer

No. OptimaPDF only requests access to files you explicitly select. The OAuth token grants access only to the specific files you choose to import or the folder you want to export to. OptimaPDF never scans your cloud storage, never stores tokens on the server, and has no ongoing access to your files.

Question 35

Why do I have to log in every time?

Accepted Answer

For security reasons, your login session is temporary. The OAuth token expires after a short period or when you close the browser tab. This prevents unauthorized access if you leave your computer unattended. Recently used sites and folders are saved locally in your browser, so reconnecting takes just one click.

Question 36

Can other people see my connected cloud accounts?

Accepted Answer

No. Any saved connections (recent SharePoint sites, OneDrive folders, Google Drive folders) are stored exclusively in your browser's localStorage on your device. They are never sent to the OptimaPDF server, never synced between devices, and other people using the same site from different computers cannot see your connections.

Question 37

What is AI Chat with PDF and what is it for?

Accepted Answer

AI Chat lets you ask questions about the content of a PDF document — AI analyzes the text and answers based on its content. Requires your own OpenRouter API key. Useful for quickly finding information in long documents, summarizing sections or asking about specific data.

Question 38

What is AI Summary and what is it for?

Accepted Answer

AI Summary generates a short summary of a PDF file's content using artificial intelligence. Requires your own OpenRouter API key. Useful when you want to quickly understand the main points of a long document without reading it entirely.

Question 39

What is AI Translate and what is it for?

Accepted Answer

AI Translate lets you translate a PDF file's content to another language using artificial intelligence. Requires your own OpenRouter API key. Useful for translating documents, contracts and articles without copying text to external translators.

Question 40

What is OCR PDF and what is it for?

Accepted Answer

OCR (Optical Character Recognition) recognizes text in scanned images and PDF pages, converting it into editable text. Useful when you have a document scan (photo or image-based PDF) and want to extract text for further editing or searching.

Question 41

What is Compare PDF and what is it for?

Accepted Answer

Compare PDF analyzes two documents and shows differences between them — both in text mode (list of added/removed fragments) and visual mode (visual marking of differences on pages). Useful for checking changes in contracts, document versions and revisions.

Question 42

What is Fill PDF Form and what is it for?

Accepted Answer

Fill PDF Form lets you fill fields in interactive AcroForm forms (text fields, checkboxes, dropdown lists) and flatten the result. Useful for filling applications, surveys and official forms without printing and manual filling.

Question 43

What is PDF/A conversion and what is it for?

Accepted Answer

PDF/A is an archival PDF standard designed for long-term document storage. The tool converts a regular PDF to PDF/A-1b format, adding XMP metadata, color profile and removing dynamic elements. Useful for archiving documents that must remain readable for many years.

Frequently Asked Questions