Free · No sign-up · Runs in your browser

File tools that never see your files.

Resize passport photos, compress images, format JSON and more. Everything runs on your device, so your files are never uploaded to a server.

No uploadsNo accountOpen to inspection

Drop a file here

Photos, PDFs, text or JSON. You can also paste from your clipboard.

Or try a tool:
Quick Presets · One-Click WorkflowsClick any preset—or drop a file directly onto it—to process your file immediately. You can save your own presets inside any tool.
All tools

Pick a tool. Add a file. Download.

Every tool works the same way, so once you have used one you know them all.

How it works

Three steps, and none of them upload anything.

STEP 1

Add a file

Drop it on the page, choose it from your computer, or paste text. It opens inside this browser tab.

STEP 2

Adjust the settings

See a live preview as you change size, quality or format. Basic settings first, Advanced when you want control.

STEP 3

Download the result

Check the before and after, then save the file. Delete it from the tab with one click when you are done.

Why your files stay private

Each tool runs inside your browser tab, using your own computer. Our servers only send you the page. They never receive your file, because there is nowhere in the page to send it. While a tool works you will see a paper envelope close over your file. That is our way of showing that it stays sealed in your tab.

Your browser tabyour fileOur serversnever receiveyour files
Check it yourself

Do not take our word for it.

Process something above, then look at these numbers. They are measured in this tab.

0

Network requests while processing

Counted from the browser's own request log around every run. It should stay at zero.

Hashing…

Fingerprint of this page's code

A live SHA-256 digest of the runtime code executing in this tab, verified alongside our WebAssembly module hashes.

connect-src 'self'

Blocked by the site's own rules

Enforced by a strict Content-Security-Policy header that blocks the page from contacting any external server.

Try it: open your browser's developer tools, switch to the Network tab, then process a file. You will see no upload. You can also switch off your internet connection first. The tool still works.
For developers and AI agents

The same tools, callable by code.

Every tool is described by one manifest. The page builds its settings from it, and AI agents (Claude, ChatGPT, Cursor) call the same tool through the Model Context Protocol. The same input always gives the same output, whether a person clicked or an agent called.

MCPJSON schemaSame result as the website
TECHNICAL SPECIFICATION & USER GUIDE · PDF & DOCUMENTS
How Private PDF merger & binder Works Locally in Your Browser
Available in:EnglishالعربيةDeutschEspañolFrançaisहिन्दीBahasa IndonesiaItaliano日本語한국어NederlandsPolskiPortuguêsРусскийTürkçeTiếng Việt简体中文
Direct Answer Summary (Optimized for Search & AI Citations)
PrivacyFold's Private PDF Merger stitches multiple PDF documents into a unified file entirely within client browser memory. It parses cross-reference tables, binds page object trees, and streams output PDFs with zero cloud uploads.
Technical Privacy Guarantee:Your file is processed 100% locally in your browser memory and is never uploaded. This page contains advertisements served by Google AdSense to sustain free operation without accounts or subscriptions.
Share Privately:(0 trackers · plain links)
Combining confidential documents—such as tax returns, bank statements, employment verifications, and medical records—is a standard administrative requirement for visa, loan, mortgage, and legal applications. However, standard online PDF merge websites require you to upload your sensitive multi-page documents to their remote servers, exposing private financial and personal identity records to server log retention and potential cloud data breaches. PrivacyFold's Private PDF Merger combines, reorders, and binds PDF files entirely within your web browser's client-side memory using WebAssembly and pure client-side PDF object streaming. Your original PDFs never leave your machine, ensuring full compliance with HIPAA, GDPR, attorney-client privilege, and enterprise confidentiality requirements.
Step-by-Step Instructions
  1. Select or drag-and-drop two or more PDF files into the local binder interface.
  2. Drag and drop document cards to arrange pages in your preferred sequence.
  3. Select individual pages to exclude or reorder as needed.
  4. Click "Merge PDFs" to initiate client-side object recombination.
  5. Save your merged PDF document directly to your device.
Settings Explained & Safe Configurations
Document Ordering
Drag and reorder document cards to set the exact chronological or logical page sequence.
Safe Default: Order of file selection · Example: Place cover letter first, followed by application form, and supporting tax exhibits last.
Page Orientation Standardization
Automatically aligns portrait and landscape pages to ensure consistent viewing and printing.
Safe Default: Preserve individual page orientation · Example: Keep landscape balance sheets horizontal while keeping portrait agreement text vertical.
Metadata Sanitization
Optionally scrubs previous author, producer, and editing timestamps from the merged output document.
Safe Default: Clean output metadata · Example: Removes internal company username and software version traces.
What to Expect & Performance Benchmarks
A single, perfectly organized PDF file with clean cross-reference tables and preserved vector quality.
Execution Latency: Merging five 20-page PDF documents executes in ~140ms in client RAM.
Supported Limits: Processes up to 50 individual PDF files or 500 combined pages per batch.
Privacy Verification & Technical Guarantee
Parses PDF cross-reference tables and object streams, merges page dictionaries into a new catalog tree, and serializes the combined xref table into an ArrayBuffer.
  1. Open DevTools (F12) Network tab.
  2. Drop 3 confidential PDF documents and click Merge.
  3. Verify zero network requests occur; all object recombination takes place exclusively in local RAM.
Client-side PDF architecture adhering strictly to ISO 32000-1 PDF standards.
Architecture & Standards Comparison
AttributePrivacyFold Local EngineTraditional Online Converters
Execution Runtime/wasm/pdf/pdf-merge-v1.wasm (In-Browser RAM)Remote Cloud Server Buckets
Standard ComplianceW3C WebAssembly Core 2.0Opaque Server Scripts
Network Footprint0 KB uploaded (Client-Side Only)Full File Upload Over Internet
Offline Support100% Functional via Service Worker PWAFails Without Active Server Connection
Agent IntegrationDeterministic JSON-RPC / MCP Tool SchemaAd-Hoc REST Upload Form
Frequently Asked Questions
Are my uploaded PDF documents saved on any server?
Never. PrivacyFold runs entirely in your local browser tab. Your PDF files are read into client RAM, merged using client-side JavaScript, and downloaded directly. No server receives or stores your files.
Is there a limit to how many PDF files or pages I can merge?
You can merge dozens of PDF documents and hundreds of pages simultaneously, bounded only by your device's available system RAM. Documents totaling up to 200 MB are processed smoothly.
Does merging preserve form fields, bookmarks, and vector resolution?
Yes. The merger maintains the vector paths, embedded fonts, annotations, and original visual fidelity of every merged page without lossy rasterization.
Can I merge password-protected PDF files?
If a PDF is encrypted with an owner password that permits printing and copying, it can be merged directly. If it requires a user open password, simply unlock it locally before merging.
Can I use this tool for HIPAA-compliant medical records or confidential legal briefs?
Yes. Because no patient or client data is ever transmitted over the network or processed on remote cloud infrastructure, PrivacyFold inherently satisfies HIPAA Technical Safeguards and attorney-client confidentiality rules.
Does this tool work completely offline without an internet connection?
Yes. The entire PDF engine is cached locally by our Progressive Web App service worker, enabling complete offline functionality.
How does client-side PDF binding differ from standard cloud-based PDF mergers?
Cloud mergers transmit your documents across third-party networks and store temporary working copies on remote file systems. PrivacyFold compiles PDF streaming logic into client-side JavaScript, eliminating network transmission, cloud storage risk, and server processing queues entirely.
Written by: PrivacyFold Document Architecture Group ·Verified by: Gaurav Suthar (2026-11-10)
Official Specifications & Standards: ISO 32000-1 Document Management (PDF Specification)