Using the web app

The converter handles single conversions and, for paid accounts, batch uploads. This page covers what happens at each step.

Uploading

Click to browse, drag and drop, or paste an image directly onto the page. Accepted formats are PNG, JPG or WebP · max 10MB.

Editing your data

Every conversion shows the extracted data twice: as a table, and as points drawn directly on top of your graph so you can check the result at a glance. If a value looks off, fix it on the graph itself. Drag a point to move it and the table updates instantly. Use Add point to place a missing point (choose the series first when the chart has several), or select a point and press Delete point to remove it. You can also edit any cell in the table directly.

Undo (or Ctrl+Z, Cmd+Z on Mac) steps back through your changes one at a time, and Reset restores the original extraction. For signed-in users every correction is saved automatically: reopening the conversion from your history shows it exactly as you left it, and all exports use your corrected values.

Axis calibration

The overlay places points on your image using four axis anchors: X1 and X2 on the x-axis, Y1 and Y2 on the y-axis. Each anchor sits on a labeled tick of your chart and carries that tick's value. If the points look shifted relative to the graph, drag an anchor so it sits exactly on its tick mark, or tap it to type the correct tick value. Recalibrating realigns every point on the image, and any point you drag afterwards converts to data values on the corrected scale.

Exporting

Once a conversion finishes, the table can be downloaded as CSV or XLSX, or copied as TSV or Markdown. Exporting requires a free account, create one to unlock the export buttons.

History

Signed-in users see a history rail alongside the converter listing past conversions, grouped by day. Click an item to reopen it in the full editor, with your latest edits and the original image, or use the delete control to remove an item from your history.