Extract data from chart images to CSV

GetData Graph Digitizer is a paid Windows desktop tool — single license, snappy native UI, loyal engineering base. DataFromChart is a free hosted browser app. They overlap on the core extraction loop but differ on platform, price, and output. Pick DataFromChart for occasional use with XLSX-with-chart export; pick GetData for steady Windows volume and a native app.

At a glance

	DataFromChart	GetData Graph Digitizer
Pricing	Free (individual extraction)	Paid (trial available)
Platform	Any browser	Windows only
Offline use	No	Yes
Axis types	Linear, log, date	Linear, log, date, reciprocal
AI calibration	Yes	No
Color auto-extraction	Yes (live preview)	Limited
Manual point placement	Yes	Yes (precise, native feel)
CSV / TSV	Yes	Yes
XLSX	Yes (chart embedded)	Paid feature, no chart embed
Project save	Yes	Yes
Account required	No (to try)	License key

What each one is best at

DataFromChart wins on cost, platform reach, and output. Free for individual extraction. Runs in any browser — Mac, Linux, Chromebook — where GetData doesn’t. XLSX embeds the source chart and axis labels with units. AI calibration skips endpoint-clicking.

GetData wins on native feel and the reciprocal axis. Snappy on high-DPI, precise manual placement, and the rare reciprocal axis (DataFromChart doesn’t support it). At dozens of charts a month on Windows, native responsiveness compounds.

Workflow comparison

Calibration. GetData is manual: click endpoints, type values. DataFromChart offers the same plus AI endpoint proposals from labels.

Auto-extraction. GetData traces a single line; multi-series with shared colors or dense scatter is mostly manual. DataFromChart’s color-mask handles multi-color and dense data in one pass per color, with live preview.

Manual placement. GetData shines. Native placement feels more precise at high DPI. DataFromChart’s is fine but native has fewer layers between mouse and canvas.

Export. GetData: CSV default; XLSX paid, no chart embed. DataFromChart: CSV, TSV, XLSX (chart embedded), JSON, all free.

When to pick DataFromChart

macOS, Linux, or Chromebook — GetData doesn’t run.
Not enough chart volume to justify a paid license.
XLSX with source chart embedded.
AI-assisted calibration or vision-LLM extraction.
Any machine without re-licensing.

When to pick GetData Graph Digitizer

Windows with steady weekly volume.
Reciprocal axis or another non-standard transform.
Native desktop UI for muscle memory.
Fully offline, regularly.
Downstream tooling already wired to GetData’s project format.

Cost

GetData is paid per seat (trial available). One-time per major version; expect a major upgrade every few years.

DataFromChart is free for individual extraction. Team and bulk on the pricing page.

For a freelancer with a chart a week, DataFromChart’s free tier covers more ground. For a consultancy with five analysts running 10+ charts a week, it shifts — per-seat cost is non-trivial, but so is time saved by a snappier native app.

Accuracy

Same math: linear interpolation between calibration points. Both within ~0.5% on a clean image. The ceiling is image and user.

GetData edges on manual placement on high-DPI — native rendering, integer pixel precision. DataFromChart edges on dense multi-series scatter — color-mask in one pass.

Migration

Both export CSV cleanly; project files don’t interoperate. Re-run a few charts in DataFromChart to confirm coverage, then keep GetData for cases it handles better (or for offline).

Try DataFromChart before renewing your GetData license. Open the extractor on a chart you’ve already done in GetData and compare side by side. If results match and the workflow fits, the renewal money goes back in your pocket.