Client-side document viewer

View any document in your browser

DocLens renders PDF, Word, Excel, PowerPoint, and CSV files directly in your browser with no uploads, no downloads, and no extra software.

Formats supported

100%

Files processed client-side

100%

Zero server uploads

<1s

Instant load

Trusted by professionals

“I preview contracts, proposals, and spreadsheets daily. DocLens replaces three separate apps with one clean interface.”

Aisha K.

Legal Counsel

“Being able to open any file format without launching heavy desktop software saves me hours every week.”

Marcus R.

Product Manager

“The search and zoom are incredible. I can scan a 200-page PDF in seconds.”

Dr. Lin W.

Research Analyst

Everything you need

A proper document viewer, not a browser tab.

Drag & drop upload

Drop any document or browse your files — processed entirely in your browser.

Instant search

Find any word or phrase inside documents in milliseconds.

Precision viewing

Zoom, pan, page through — like having the original app, without installing it.

Fullscreen focus

Distraction-free reading with a single click.

Favorites & history

Mark important documents and quickly reopen recent ones.

Client-side secure

Your files never leave your device. No server uploads, no privacy concerns.

Supported formats

Every file, one viewer.

PDF

High-fidelity PDF rendering with page navigation and search

Word

Preserve formatting, tables, and images in DOCX files

Excel

Full spreadsheet interface with sorting and filtering

PowerPoint

Slide-by-slide viewing with thumbnail navigation

CSV

Tabular data viewer with search and export

How it works

Open. View. Done.

Upload or drop

Drag a file from your desktop or click to browse. No size limit.

Instant render

The viewer detects the format and renders it in your browser.

Read, search, zoom

Navigate pages, search text, and zoom to the perfect reading size.

Why DocLens

Most document viewers make you choose between accuracy and speed — or worse, upload your files to a third-party server.

We give you both: pixel-perfect rendering, entirely on your machine.

FAQ

Questions answered.

What file formats does DocLens support?

PDF, Microsoft Word (.docx), Excel (.xlsx, .csv), and PowerPoint (.pptx). More formats are coming.

Are my documents uploaded to a server?

No. Everything runs in your browser using WebAssembly and JavaScript renderers. Your files stay on your device.

Can I open multiple documents at once?

Yes. DocLens has a multi-tab interface so you can switch between documents seamlessly.

Is there a limit on file size?

DocLens handles large files with lazy loading and pagination. Performance depends on your device, but most files up to 100MB work smoothly.

Do I need an account to use DocLens?

An account lets you save favorites and track recent documents. You can also use the viewer without signing in.