Client-Side WebAssembly

Open and View Primavera P6 (.XER) Files Online

Inspect, navigate, and analyze Oracle Primavera P6 schedules directly in your browser. Powered by client-side WebAssembly for instant loading with 100% data privacy.

100% Client-Side Privacy: Your schedule files are never uploaded to any remote server. The WebAssembly engine parses and renders the schedule strictly inside your local browser memory.
https://app.xerreader.com
XER Reader Web running in browser showing Primavera P6 schedule and Gantt chart
Security Breakthrough

Why Most "Online Viewers" Put Your Schedule at Risk

Understanding the critical difference between legacy cloud viewers and XER Reader WebAssembly architecture.

Other Online Viewers

Server-Side Upload Model

Conventional web tools require you to transmit your schedule file to their remote cloud servers. Once uploaded, your project data is vulnerable:

  • Schedules stored indefinitely on unknown third-party servers
  • Violates enterprise confidentiality, NDAs, and defense regulations
  • Slow upload speeds and timeouts on 50MB+ schedule files
XER Reader Web

Client-Side In-Memory Sandbox

XER Reader processes your project schedules directly inside your browser. All parsing and calculations run locally in memory:

  • Files stay 100% on your machine in local browser RAM
  • Fully compliant with enterprise data protection standards
  • Instantaneous loading even on massive 50,000+ activity projects
Rich Web Capabilities

Desktop Power Inside Your Web Browser

No software installation required. Access all essential schedule inspection tools directly online.

Drag-and-Drop Ingestion

Simply drag and drop any Oracle Primavera P6 .xer or P6 XML file into the browser window. The file parses directly inside your local browser memory without server bottlenecks.

Full Synchronized Gantt

Explore activities and the Gantt timeline in perfect synchronicity. Adjust timescale zoom from individual shifts up to multi-year program overviews.

Critical Path & Float Analysis

Instantly highlight driving critical path activities, inspect total float, free float, and review relationship logic with predecessor and successor arrows.

WBS Filtering & Search

Drill down through the Work Breakdown Structure with an intuitive WBS drawer. Apply Excel-style column filters and instant activity code searches.

Baseline Comparisons

Overlay target, project, and user baselines on the Gantt chart to analyze schedule variance, slipped finish milestones, and duration changes.

Password-Protected Sharing

With XER Reader Cloud, publish an interactive web schedule link protected by end-to-end encryption and custom passwords for external project partners.

Compatibility

Works on Modern Browsers and Any Device

Because XER Reader Web runs entirely in modern web browsers, it operates smoothly across all major platforms without plugins or extra software.

Google Chrome
Desktop & Mobile
Apple Safari
macOS & iPadOS
Microsoft Edge
Windows & Mac
Mozilla Firefox
Linux, Mac, Windows
Common Questions

Frequently Asked Questions About the Web Viewer

Do my files get uploaded to any server when opening a schedule online?
No. When you drag and drop a schedule into XER Reader Web, it is parsed entirely inside your browser memory using WebAssembly. The file is never transferred to or stored on our servers.
Do I need to install plugins or Oracle Primavera P6?
No. XER Reader Web requires zero software installations and zero browser extensions. All you need is a modern web browser.
Is there an activity limit for the web viewer?
XER Reader Web handles schedules with 50,000 or more activities smoothly thanks to our high-performance in-memory processing engine and hardware-accelerated rendering.
Can I open Microsoft Project files in the web viewer?
Yes. You can use our Open MPP Online viewer to open Microsoft Project (.mpp, .mpx, and XML) schedules directly in your browser. For advanced desktop workflows on macOS and Windows, check out XER Reader for Mac and Windows in the Pro edition.
Can I share schedules with clients using a web link?
Yes. With XER Reader Cloud, you can publish interactive schedules as private web links. Recipients can open and inspect the schedule in their browser without creating an account or installing any software.
Ready to Get Started?

Start Viewing Primavera P6 Schedules Right Now

Open the web viewer directly in your browser. Drag and drop your .xer file for secure, completely confidential schedule viewing.

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