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Practical PDF guides — steps, processing modes and limitations.
Chat With a PDF: Ask Questions and Check the Answers
Ask AI about selectable PDF text with PDF168. Understand what is sent, the text limit, independent questions, and how to verify answers against the original.
Updated Open Chat with PDF →How to Fill an Interactive PDF Form in Your Browser
Fill existing PDF text fields, checkboxes, radio groups, and dropdowns locally. Learn which forms work, how to flatten locally, and what to verify after export.
Updated Open Fill Form →How to Merge PDFs in the Right Order, with a Worked Example
Combine PDFs using the file-order controls, check a three-page sample, and avoid missing pages, mixed page sizes and form problems.
Updated Open Merge PDF →Compress a PDF: Choose a Level and Check Size Against Quality
Use compression levels 1–9, reproduce a documented image-PDF example, and check readability before submitting a smaller file.
Updated Open Compress PDF →Extract PDF Pages: Page Ranges, Ordering and a Worked Example
Learn the exact page-range syntax for PDF168, extract pages into one PDF, and check the result with a downloadable three-page example.
Updated Open Split PDF →Add a Signature to a PDF: Place, Resize and Check the Download
Draw, type or select a signature image, place it on PDF pages, and avoid common mistakes with backgrounds, page selection and saved placements.
Updated Open Sign PDF →How to Redact a PDF: Modes, Limits, and Output Checks
Remove detected personal data with PDF168. Choose local or AI processing, handle scanned pages, and check the downloaded redacted PDF for missed details.
Updated Open Anonymize PDF →How to Convert JPG to PDF Online Free (No Upload)
Convert JPG to PDF online free, right in your browser. Combine multiple images into one PDF, reorder pages, and keep every photo 100% private.
Open Images to PDF →How to Convert PDF to Excel & Extract Tables Free
Convert PDF to Excel free and securely. Extract tables from any PDF into a clean, editable .xlsx spreadsheet in seconds — step-by-step, no sign-up.
Open PDF to Excel →How to Convert PDF to JPG Online Free (No Upload)
Convert PDF to JPG free, right in your browser. Turn every page into a high-quality JPG image in seconds — no uploads, no signup, 100% private.
Open PDF to JPG →How to OCR a PDF and Make a Scan Searchable Free
Learn how to OCR a PDF and make a scanned document searchable — free, fast, and secure. Step-by-step guide with language tips inside.
Open OCR PDF →How to Rotate a PDF and Save It: Free, Private Guide
Rotate a PDF 90, 180, or 270 degrees and save it in seconds. Free, no upload, runs entirely in your browser, so your file never leaves your device.
Open Rotate PDF →How to Scan a Document to PDF With Your Phone Free
Scan documents to PDF with your phone camera. Auto-crop, straighten, and enhance pages into one PDF — free, in your browser, with nothing uploaded.
Open Scan to PDF →How to Unlock a Password-Protected PDF Online Free
Learn how to unlock a password-protected PDF and remove the password in seconds — free, secure, no sign-up. Step-by-step guide inside.
Open Unlock PDF →Edit PDF Online Free: Easy Step-by-Step Guide
Learn how to edit a PDF online for free in your browser. Reorder, delete, and rotate pages privately with PDF168 - no signup, no uploads.
Open Organize PDF →