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What is webplotdigitizer?

baikemark/webplotdigitizer — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2025-09-04

Audience · researcherComplexity · 1/5QuietLicenseSetup · easy

In one sentence

A web tool that extracts the underlying numerical data from a chart image, turning graphs from papers or reports into spreadsheet-ready numbers.

Mindmap

mindmap
  root((repo))
    What it does
      Upload chart image
      Detect axes
      Extract data points
    Tech stack
      Web based
      Computer vision
    Use cases
      Literature review data
      Digitize old charts
      Competitor pricing
    Audience
      Researchers
      Analysts
    Notes
      Frontend open source
      Cloud AI features hosted

Code map

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What do people build with it?

USE CASE 1

Extract numerical data from a chart in a research paper for a literature review.

USE CASE 2

Digitize an old historical graph that was never stored digitally.

USE CASE 3

Pull competitor pricing numbers from a chart shown in a slide deck.

USE CASE 4

Convert a scatter plot image into a spreadsheet-ready dataset.

What is it built with?

JavaScriptComputer Vision

How does it compare?

baikemark/webplotdigitizer0verflowme/alarm-clock0verflowme/seclists
Language—CSS—
Last pushed2025-09-042022-10-032020-05-03
MaintenanceQuietDormantDormant
Setup difficultyeasyeasyeasy
Complexity1/52/51/5
Audienceresearchervibe coderops devops

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min

No install needed for the web app, but advanced AI-assisted extraction runs on the company's hosted service.

Frontend code is open source and freely viewable/modifiable, AI cloud features are run by the company separately.

Copy-paste prompts

Prompt 1
Show me how to use WebPlotDigitizer to extract data points from a line graph image.
Prompt 2
Walk me through calibrating the axes in WebPlotDigitizer before extracting chart data.
Prompt 3
Explain how to export digitized chart data from WebPlotDigitizer into Excel.
Prompt 4
What chart types can WebPlotDigitizer handle, and how do I set it up for a scatter plot?

Frequently asked questions

What is webplotdigitizer?

A web tool that extracts the underlying numerical data from a chart image, turning graphs from papers or reports into spreadsheet-ready numbers.

Is webplotdigitizer actively maintained?

Quiet — no commits in 6-12 months (last push 2025-09-04).

What license does webplotdigitizer use?

Frontend code is open source and freely viewable/modifiable, AI cloud features are run by the company separately.

How hard is webplotdigitizer to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is webplotdigitizer for?

Mainly researcher.

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