How to use Inkwell PDF
Inkwell PDF is a private, browser-based PDF toolkit. Most tools process your file locally, right on your device, without uploading it to a server.
Getting started
Pick a tool
Open any tool from the bottom nav (mobile) or sidebar (desktop): Merge, Split, Compress, Sign, or the full list under "More."
Drop in your file
Drag a PDF (or image, for Image ↔ PDF) into the dropzone. Most tools work entirely in your browser, so nothing leaves your device unless you use a tool that needs the cloud — like Chat with PDF, PDF to DOCX, Seal (hosted signing), or Signature Requests (Inkwell Sign) — or a cloud import.
Download your result
Your finished file downloads straight to your device. Merge can also save to Google Drive or Dropbox, and batch mode returns one ZIP.
Tools at a glance
Merge PDF
Combine multiple PDFs into one document.
Split PDF
Break a PDF apart into separate files or pages.
Compress PDF
Shrink file size while keeping quality.
Quick Sign
Add a signature to a document.
Add Text
Type directly onto your PDF.
Add Page Numbers
Number every page automatically.
Remove Password
Unlock a password-protected PDF.
Chat with PDF
Ask AI questions about your document.
Rotate & Delete
Organize, rotate, or remove pages.
PDF to DOCX
Convert a PDF into an editable Word file.
Password Protect
Secure a PDF with a password.
Watermark PDF
Add a watermark across your pages.
Image ↔ PDF
Convert images to PDF or PDF to images.
Invoices (Pro)
Create invoices and quotes, send by email or link, track payments, automatic reminders and recurring billing.
Request Signatures (Pro)
Email a PDF for someone to sign and track it.
OCR / Make Searchable
Make a scanned PDF searchable.
Invoicing in 5 steps
Set up your business
Add your business details, logo and defaults in Invoices → Settings. Add a Payment link to show a Pay now button on your invoices.
Add clients and a catalog
Add clients and your products or services (Catalog) up front, or add them as you go while creating an invoice.
Create and send
Create an invoice or quote, then Send by email or Share → Copy link. Use Mark as sent if you delivered it yourself.
Reminders and recurring
Turn on automatic reminders in Settings (3, 7, 14, or 30 days overdue), or make an invoice recurring from its More menu.
Record payments and review
Record payments and credits with Record payment, and see totals and aging in Reports.
Tips
- Keep files under your plan's size limit for the smoothest experience.
- Have a stack of files? Batch mode (Standard and Pro) processes them together and returns one ZIP.
- Standard and Pro plans unlock higher daily usage limits across tools.
- Double-check a merged or converted file before deleting your original.
Your data & privacy
Most tools — merging, splitting, rotating, compressing, page numbering, watermarking, quick signing, OCR, adding text, converting images, and adding or removing passwords — run entirely inside your browser, so your files are never uploaded to a server for those operations. Four features are different: PDF to DOCX uploads your pages to a secure AI service to convert them (and they remain in your app storage), Chat with PDF sends only your document's text to an AI service to answer your question, and Seal (hosted signing) and Signature Requests (Inkwell Sign) upload and store your document so recipients can sign it from a private link. You can delete your account — including your signature requests and their stored documents — at any time from your Profile. See our Privacy Policy and Privacy First page for full details.