Online tachograph file viewer

Open a .DDD file and understand what it contains.

Use TachoAssist as a browser-based tachograph file viewer for driver cards and Vehicle Units, then move from .DDD source records to activity, compliance findings and reports.

Online tachograph file viewer showing driver-card DDD activity, weekly totals and a detailed timeline

What is a .DDD tachograph file?

A .DDD file is an original download from a digital tachograph driver card or a vehicle’s tachograph unit. Specialist software is needed to translate the signed records into something a driver or operator can review.

TachoAssist keeps the source file connected to its analysis. It is more than a raw tachograph file reader: you can follow activity, investigate automated findings and create evidence for a chosen period.

Two file types, two different views.

The file source determines which records are available and which plan is required.

Driver-card .DDD files

Review driving, other work, availability, breaks and rest across day, week, timeline and calendar views. Supported by Driver and Business.

Vehicle Unit .DDD files

Review vehicle identity, detected drivers, events, faults, downloads, odometer records and recorded locations. Supported by Business.

Original file history

Keep uploads tied to their source, review file history and manage retention, deletion or archiving from the same workspace.

From file viewer to practical review.

  • Readable activity timelines and monthly calendars
  • EU and UK Drivers’ Hours findings
  • Road transport working-time and tachograph-rule findings
  • Driver, selected-driver, fleet and vehicle reports
  • PDF and Excel output for Business users

Important: automated findings support compliance work and must be reviewed. They are not legal advice or a definitive statement of compliance.

Tachograph report generator using uploaded DDD file data with PDF and Excel format choices

Questions

.DDD file viewer FAQ

What program opens a .DDD file?

TachoAssist opens driver-card and Vehicle Unit .DDD files in a modern web browser and presents their tachograph records as readable analysis rather than raw file data.

Are driver-card and Vehicle Unit .DDD files the same?

No. A driver-card file centres on one driver’s activities and card records. A Vehicle Unit file contains vehicle tachograph records such as identified drivers, events, faults and recorded positions.

Can a .DDD file be turned into a PDF or Excel report?

Yes. TachoAssist can use uploaded tachograph records to generate reports for selected date ranges. Business reporting supports PDF and Excel outputs.

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Open your own tachograph file.

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