Tachograph analyzer.
Every day on the card, in its 24-hour bar.
This free tool reads a driver card or vehicle unit download (.ddd or .tgd) in your browser and checks driving, breaks and rest against Regulation (EC) 561/2006. Upload the driver card and you see driving, breaks and rest day by day, each week's driving and the possible infringements with their article. With the vehicle unit (VU) download: who drove each day, driving without a card, the equipment's events and when the inspection falls due. The file never leaves your computer.
Below, an example week. Upload your file to see yours.
example.ddd
Example driver
- Card
- E000000000000000 · Spain
- Period
- 2026-10-05 to 2026-10-09
- Days with activity
- 5
- Generation
- 2 (smart)
Example data: upload your file to see yours.
2 possible infringement(s)
- Continuous driving07/10/2026 06:00 UTC → 07/10/2026 11:00 UTC
Continuous driving of 5 h 00 min without the 45-minute break (or 15 + 30).
Art. 7 Regulation 561/2006 - Daily driving09/10/2026 05:00 UTC → 09/10/2026 17:00 UTC
Driving day of 10 h 30 min: the maximum is 10 h, and only twice a week.
Art. 6.1 Regulation 561/2006
Driving per week
| Week (Monday) | Driving | Limit | Days over 9 h |
|---|---|---|---|
| 2026-10-05 | 46 h 45 | 56 h 00 | 2 of 2 |
Day by day, 00:00 to 24:00 UTC
- 2026-10-059 h 00
- 2026-10-068 h 15
- 2026-10-079 h 00
- 2026-10-0810 h 00
- 2026-10-0910 h 30
Indicative analysis of Articles 6, 7 and 8 of Regulation (EC) 561/2006 using the data on this card. It does not check the file's signature or apply exceptions (Art. 13), AETR, ferry or train, multi-manning, or compensation for reduced weekly rests. Periods without a card count as rest. Times are in UTC, as the tachograph stores them.
The limits it checks, in one table.
| What | Limit | Article |
|---|---|---|
| Continuous driving | 4 h 30, then a 45-minute break (or 15 + 30, in that order) | Art. 7 |
| Driving per day | 9 h; 10 h at most twice a week | Art. 6.1 |
| Weekly driving | 56 h | Art. 6.2 |
| Two consecutive weeks | 90 h | Art. 6.3 |
| Daily rest | 11 h within the following 24 h; 9 h reduced (max. 3 between weekly rests) or 3 + 9 split | Arts. 8.2 and 8.4 |
| Weekly rest | Before six 24-hour periods have passed since the previous one | Art. 8.6 |
Keep your drivers' downloads.
In Cofactu you analyze each download the same way and also keep the untouched original, with its SHA-256 fingerprint, who uploaded it and its history, alongside the services, the consignment note (carta de porte) and the DeCA of each trip.
Tachograph: who needs it, downloads and retentionFAQ
The analyzer, no fine print.
What it reads, what it checks and what it does not.
Talk to usThe driver card download and the vehicle unit (VU) download of the digital tachograph, first generation and second generation (smart tachograph, versions 1 and 2): .ddd, .tgd (the usual name in Spain), .c1b, .esm or .v1b files. It recognises which one it is by its content, not by its name.
Registration plate and VIN, the period the VU holds and the last download, the kilometres and who held the card each day, driving without a card, the equipment's events and faults (card inserted while driving, power cuts, over-speeding, tampering attempts) and the date of the next tachograph inspection, which falls due at least every two years (Regulation 165/2014, Art. 23). Each driver's times are checked with their own card: the VU only sees its own vehicle.
No. The file is read in your browser with JavaScript and does not leave your computer: neither Cofactu nor anyone else receives the driver's data.
The times of Regulation (EC) 561/2006: 4 h 30 of continuous driving and a 45-minute break (or 15 + 30), 9 h of driving per day (10 h twice a week), 56 h per week and 90 h in two consecutive weeks, a daily rest of 11 h (reduced to 9 h at most three times between weekly rests, or split into 3 + 9) and a weekly rest before six 24-hour periods have passed.
No. The time analysis is indicative, to review in good time: it does not apply exceptions (Art. 13), AETR, ferry or train, multi-manning, or compensation for reduced weekly rests. What counts in an inspection is the original file, which must be kept.
Yes. In your browser it checks the download's digital signature against the European tachograph root (ERCA, published by the Commission's Joint Research Centre): first the national authority's certificate, then the card's or vehicle unit's, then each data block. If something was changed after it was downloaded, it says so and in which block. First generation (RSA) and second and smart (ECDSA, Brainpool and NIST curves).
The driver card at least every 28 days and the vehicle unit at least every 90 days (Regulation (EU) 581/2010). The company keeps the downloads for at least one year.
Because the tachograph records in UTC. In mainland Spain local time is UTC + 1 in winter and UTC + 2 in summer; the limits are calculated the same way.
