Organise & Edit 3
How to Merge PDF Files Without Uploading Them Anywhere
Combine multiple PDFs into one file directly in your browser. No uploads, no watermarks, no account — your documents never leave your device.How to Split a PDF Into Multiple Files (Page Ranges, Every Page, or Single Pages)
Split a large PDF into smaller files by page range or extract single pages — all in your browser, with no upload and no quality loss.How to Rotate and Reorder PDF Pages
Fix sideways scans and rearrange pages in your browser. Rotate single pages or the whole document and drag pages into the right order.Optimise 6
How to Compress a PDF Without Losing Quality
Reduce PDF file size in your browser by downsampling and recompressing images intelligently — keep text crisp and avoid the blur of aggressive compressors.How to Flatten a PDF (and Why You Might Need To)
Flattening merges form fields, annotations, signatures and layers into the page so they can't be edited or lost. Learn when and how to do it.How to Convert a PDF to Grayscale
Turn a colour PDF into grayscale in your browser to cut printing costs, reduce file size, or meet submission requirements.PDF Compression Explained: DPI, JPEG Quality and Downsampling
A clear, technical explanation of how PDF compression actually works — image downsampling, JPEG quality, and why text PDFs are already small.How to Reduce PDF Size for Email Attachments
Email limits are often 20–25 MB. Learn practical ways to shrink a PDF below the limit in your browser, from compression to splitting.How to Repair a Corrupted PDF
When a PDF won't open, a repair tool can often rebuild its structure. Learn what causes corruption and how browser-based repair works.Convert 4
What Is PDF/A and When Do You Actually Need It?
PDF/A is the ISO standard for long-term archiving. Learn what it requires, the difference between PDF/A-1b and other levels, and when you genuinely need it.How to Convert Images to a Single PDF
Turn JPGs and PNGs into one tidy PDF in your browser. Control page size and orientation, and keep your photos off remote servers.How to Convert PDF Pages to Images (JPG or PNG)
Export PDF pages as high-quality JPG or PNG images in your browser. Choose resolution for crisp results without uploading your file.How to OCR a Scanned PDF to Make It Searchable
Add a searchable text layer to scanned PDFs in your browser with OCR. Understand what affects accuracy and how to get the best results.Security & Forms 4
How to Password-Protect a PDF (and What the Encryption Actually Does)
Add a password to a PDF in your browser and understand the difference between a user password, an owner password, and real AES encryption.How to Remove a Password From a PDF You Own
Remove a known password from a PDF in your browser while keeping the text selectable. Learn the difference between unlocking and cracking.How to Redact Sensitive Information From a PDF Properly
Permanently remove sensitive text and images from a PDF — and avoid the classic mistake of 'redaction' that can be undone with copy-paste.How to Fill Out a PDF Form
Complete interactive and flat PDF forms in your browser, type into fields or add text anywhere, then save and share without uploading.Annotate & Sign 4
How to Add a Watermark to a PDF
Stamp text or image watermarks across a PDF in your browser — mark documents as Draft, Confidential, or branded, without uploading them.How to Add Page Numbers to a PDF
Insert page numbers into a PDF in your browser with control over position, format and starting number — useful for reports, contracts and exhibits.How to Sign a PDF Electronically
Add a signature to a PDF in your browser — draw, type or upload an image — and place it exactly where it belongs without uploading the document.How to Crop Margins From a PDF
Trim white margins or unwanted edges from PDF pages in your browser to improve readability on small screens and tidy up scans.Privacy & Security 2
Why Browser-Based PDF Tools Are More Private Than Online Uploaders
Most 'online PDF' sites upload your files to a server. Learn how browser-based processing works and why it keeps sensitive documents private.PDF Security Explained: Passwords, Permissions and Encryption Levels
Understand how PDF security really works — open vs permissions passwords, RC4 vs AES, and what each actually protects against.