Datalog Viewer
Drop a CSV or TSV ECU log and chart its channels instantly — AFR, boost, knock, timing and more. It runs entirely in your browser: nothing is uploaded and nothing is stored.
This is a free, private datalog viewer: drop a CSV/TSV ECU log and it charts the channels in your browser using our in-house engine. The file never leaves your computer — it is parsed locally with the browser's FileReader, never uploaded, and never stored. It is a deliberately limited viewer (text logs, up to eight channels, view + basic stats); the full analyser — XLSX and binary/MDF logs, saved projects, calculators and more — is available to approved workshops after signing in.
Load a log
Your log stays on your machine
Parsed in your browser
The browser's FileReader reads the file locally and charts it on the page. There is no upload — the data never touches our servers.
Nothing stored
No account, no database, no cookies holding your data. Reload or press “Clear” and it is gone — zero footprint.
Real chart engine
It renders with the same in-house, dependency-free canvas engine as our full analyser — HiDPI, decimated for big logs.
The full datalog analyser is behind sign-in
This free viewer is intentionally limited. Approved workshops get the complete analyser inside the dealer portal — built for real calibration work, not just a quick look:
More formats
CSV, XLSX and legacy .xls, plus binary/MDF (.mf4) ECU logs — not just text exports.
Saved projects & folders
Group runs into named projects, organise them in folders, and bulk-upload multiple logs at once.
Built-in calculators
Injector sizing, thermal efficiency, octane/IAT and more — alongside the charts, on your data.
Saved layouts & collaboration
Your analyser layout is remembered per project, and your tuner can review the same session on your orders.
Want the full analyser?
It is part of the approved-workshop dealer portal. Accounts are manually reviewed; calibrations are supplied for off-road and competition use.
Datalog viewer — common questions
Is my datalog uploaded to a server?
No. It is read and charted entirely in your browser via the FileReader API — never uploaded, never stored. There is no server endpoint that receives the file, so there is nothing to leak and no database footprint.
What file formats does the free viewer support?
CSV, TSV and plain-text logs (.csv, .tsv, .txt, .log). XLSX, legacy .xls and binary/MDF (.mf4) logs are handled by the full analyser after you sign in.
Why is it limited to a few channels?
To keep it fast and focused as a quick-look tool. The full analyser lifts the limits and adds projects, calculators and more. Apply for workshop access to use it.
Can you calibrate from my log?
Yes — that is the service. Approved workshops upload the file and logs and we develop and validate the calibration against your data. See datalog review and ECU tuning for workshops.
From a quick look to a validated calibration
Spotted something in the log? Approved workshops calibrate directly with us — we develop and validate the file against your data before sign-off.
