Hi everyone , I have the problem, that pdf plots are displayed blurry when I open them on Mac in Preview (other pdf viewers are fine). This problem was already discussed (and solved) for MatPlotLib: [Bug]: imshow interpolation='none' ignored when using savefig() to PDF format · Issue #25575 · matpl…

hi @ducky , Do you have a minimal reproducible example of a Plotly imshow graph you were trying to build?

Hi, Yes, I see this problem for any px.imshow or go.Heatmap. Here is the sample: `import plotly.express as px if name == “main”: data = [[1, 20, 30], [20, 1, 60], [30, 60, 1]] fig = px.imshow(data) fig.write_image(“heatmap.pdf”)` Here is the result: [image] The problem only appears in Pr…

That’s the same result I got, @ducky . Thanks for sharing. A quick workaround might be to save the image as a .svg file. import plotly.express as px data = [[1, 20, 30], [20, 1, 60], [30, 60, 1]] fig = px.imshow(data) fig.write_image("heatmap-svg-type.svg") But I realize it’s only a workaround. …

Saving as svg is not a workaround: as soon as I convert that svg to pdf I get the same problem.

Comparing with matplotlib, I see that they encode the full size image of the heatmap into an svg, while plotly has 2x2 image. Maybe this is the reason? The code to compare: import matplotlib.pyplot as plt import plotly.express as px if __name__ == "__main__": data = [[1, 2], [2, 1]…

Blurry Plots on Mac Preview

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ducky March 20, 2026, 6:11pm 2

Hi,

I’m facing the same issue. Did you manage to find a solution?

Thank you!

1 Like

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Blurry Plots on Mac Preview

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