Siliph blog
Guides to PDFs, photos and online forms
Step-by-step guides to editing, converting and compressing PDFs, resizing photos and uploading documents to online forms.
How to Convert a PDF to Excel for Free (and Keep the Columns)
Convert a PDF table or bank statement to Excel for free, use Get Data from PDF in Excel, handle scanned files and fix numbers stored as text after conversion.
Oct 24, 2026 · 1 min read
How to Compress a PDF for Free on Any Device
Make any PDF smaller for free: pick the right compression level, shrink files for email or WhatsApp, and use the built-in options on Mac, Windows and phones.
Oct 24, 2026 · 1 min read
How to Unlock a PDF and Remove Its Password (Legally)
Remove a password from a PDF you own: the difference between open and owner passwords, how to unlock online for free, and how to do it in Acrobat or Preview.
Oct 24, 2026 · 1 min read
How to Create a Fillable PDF Form for Free
Make any PDF fillable for free: detect fields, add checkboxes and drop-downs, set the tab order and test the form, with LibreOffice and Acrobat compared.
Oct 24, 2026 · 1 min read
How to Make a Paystub Online for Free (and Keep It Legal)
Make a free US or Canadian pay stub: what it shows, how to work out Social Security, Medicare and CPP from official sources, and why fake stubs are fraud.
Oct 24, 2026 · 1 min read
How to Combine PDFs Into One File on Windows, Mac and Online
Put two or more PDFs into one file for free: merge online in the right order, use Finder or Preview on a Mac, and fix locked files, page order and file size.
Oct 24, 2026 · 1 min read
How to Add a Watermark to a PDF (Text or Logo, Free)
Add a CONFIDENTIAL, DRAFT or logo watermark to a PDF for free, with the right opacity and angle, plus the options in Word, Google Docs and Acrobat.
Oct 24, 2026 · 1 min read
How to Edit a PDF for Free (Online, No Sign-Up)
Edit a PDF for free with no sign-up: change existing text, add text, images and signatures in your browser, plus free options on Mac, Windows and phones.
Oct 24, 2026 · 1 min read
How to Rotate a PDF Permanently and Save It
Rotated a PDF and it opened sideways again? Learn the difference between rotating the view and the page, and how to save rotation on any device for free.
Oct 24, 2026 · 1 min read
How to Edit Text in a Scanned PDF: 3 Methods That Work
A scanned PDF is a picture, so its text cannot be selected. Learn when to cover and retype, when to run OCR and edit in Word, and how to avoid OCR errors.
Oct 24, 2026 · 1 min read
How to Extract Images From a PDF at Full Quality
Pull photos out of a PDF at their original resolution, find out why charts do not extract, and when to render pages instead. Free online and desktop options.
Oct 24, 2026 · 1 min read
How to Password Protect a PDF (and Choose a Password That Holds)
Lock a PDF with an open password, understand why permission limits are weak, and pick a password using current NIST and NCSC advice. Free, no account.
Oct 24, 2026 · 1 min read
How to Fill a PDF Form on Your Phone (iPhone and Android)
Fill and sign PDF forms on a phone: tell fillable, flat and XFA forms apart, then use iPhone Preview, Google Drive or a browser tool. Free, no app needed.
Oct 24, 2026 · 1 min read
How to Remove Pages From a PDF on Any Device
Delete pages from a PDF by thumbnail, keep only the pages you need, and avoid page-number mix-ups. Steps for Siliph, Mac Preview, iPhone and Acrobat.
Oct 24, 2026 · 1 min read
How to Merge PDFs on iPhone and Android Without an App
Combine PDFs on a phone with no app: use the iPhone Preview app on iOS 26, or any browser on iPhone and Android, add photos as pages and set the order.
Oct 24, 2026 · 1 min read