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 Unir Archivos PDF en el Navegador 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)
La herramienta para unir PDF de PrivacyFold combina múltiples documentos PDF dentro de la memoria del navegador. Analiza las tablas de referencias cruzadas y genera el PDF resultante con cero transmisiones en la nube.
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)
Combinar documentos sensibles como contratos, declaraciones de la renta o registros bancarios suele requerir servicios que almacenan sus archivos en la nube. PrivacyFold une y reordena páginas PDF directamente en la memoria RAM de su navegador mediante WebAssembly y manipulación de flujos de objetos PDF. Sus archivos originales nunca salen de su ordenador, cumpliendo plenamente con normativas RGPD y el deber de confidencialidad.
Step-by-Step Instructions
  1. Seleccione o arrastre los archivos PDF que desea unir.
  2. Reordene las páginas o documentos arrastrándolos según lo necesite.
  3. Pulse el botón Unir.
  4. Descargue el archivo PDF combinado inmediatamente.
What to Expect & Performance Benchmarks
Un único documento PDF unificado preservando toda la calidad vectorial original.
Execution Latency: Fusión de documentos de 100 páginas en menos de 200 ms.
Supported Limits: Procesamiento fluido de archivos de hasta 200 MB en la memoria del navegador.
Privacy Verification & Technical Guarantee
La reconstrucción de árboles de objetos PDF se produce estrictamente en memoria local.
  1. Abra las herramientas de desarrollador (F12) en la pestaña Red.
  2. Una varios documentos.
  3. Compruebe que no se genera ninguna petición HTTP saliente.
Arquitectura estática de código verificable sin backend.
Architecture & Standards Comparison
AttributePrivacyFold Local EngineTraditional Online Converters
Execution Runtimepdf-merge-v1.wasm (In-Browser RAM)Remote Cloud Server Buckets
Standard ComplianceISO 32000-1 (PDF 1.7)Opaque 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
¿Se guardan mis documentos en algún servidor?
Nunca. PrivacyFold opera completamente en la pestaña de su navegador. Sus archivos se leen en la RAM local, se fusionan mediante código en el cliente y se descargan sin tocar la red.
¿Se mantiene la calidad original de las fuentes y gráficos vectoriales?
Sí. El proceso conserva los trazos vectoriales, fuentes incrustadas y la resolución original sin aplicar rasterización destructiva.