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OTPU OTP
File conversion

Convert OTPU to OTP

Verified by Adam B.· reviewed by FE Editorial ·updated Jun 22, 2026
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Is it possible to convert OTPU to OTP?
Yes - OTPU converts to OTP.

.otpu and .otp are the same graph template, differing only in Unicode (2018+) versus legacy encoding. In Origin open the template on a graph, choose File: Save Template As and set the file-type dropdown to Origin Graph Template (*.otp). Origin 2023+ still supports writing the older .otp.

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Why convert OTPU to OTP?

Origin 2018 moved graph templates to Unicode .otpu, which older Origin releases cannot read. Saving back to .otp lets users on Origin 2017 or earlier apply the same graph styling.

How to convert OTPU to OTP

OriginLab Origin (Save Template As) PAID

Open a graph built from the .otpu, then choose File: Save Template As and switch the file-type dropdown to the older *.otp before saving.

OriginLab OriginPro PAID

Same in OriginPro: File: Save Template As, then pick *.otp in the format list to write the non-Unicode template.

About these formats

.OTPU Origin Unicode Graph Template

An .otpu file is a Unicode graph template created by OriginLab's Origin, the data analysis and graphing package used by scientists and engineers. It stores the layout and formatting of a…

Open .OTPU details →
.OTP Origin graphic template file

A .OTP file is associated with Origin graphic template, a data file.

Open .OTP details →

Quality & what to watch

  • The legacy .otp format is not Unicode, so special characters in labels or notes can be lost.
  • Only Origin performs this conversion; there is no online or third-party tool for these formats.
  • Styling and plot settings are preserved, but templates never contain the underlying data.

Frequently asked questions

Why downgrade to .otp?
So the graph template can be opened in Origin 2017 or earlier, which cannot read Unicode .otpu files.
Can Origin 2023 still save .otp?
Yes. Origin 2023+ dropped saving .opj projects but still writes older template types like .otp.
Is anything lost in the conversion?
Non-Unicode encoding may drop special characters; the graph layout and formatting stay intact.
Do templates include my data?
No, both .otpu and .otp store only the graph's appearance and plot definitions.