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Encoded Polyline Coordinate Converter

Encode latitude/longitude coordinate arrays to Google-style polylines and decode them.

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01
Add your input
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02
Make it yours
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03
Take the result
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Encoded polyline converter online

Encode latitude/longitude coordinate arrays to Google-style polylines and decode them. Use this for the specific transformation described above. Start with the fixed sample and compare its result before replacing it with your own representative input.

How to use it

Paste JSON matching the structure in the example. Set direction, decimal precision. Choose Run tool. Review the output, then copy or download it.

Options and example settings

Option	Choices / value	Example default
Direction	encode / decode	encode
Decimal precision	Enter decimal precision.	5

Worked examples

Use this for the specific transformation described above. Start with the fixed sample and compare its result before replacing it with your own representative input.

Reproducible worked example

Settings: Direction: encode; Decimal precision: 5

Input:

[[38.5,-120.2],[40.7,-120.95],[43.252,-126.453]]

With the input and settings above, the tool produces:

Output:

_p~iF~ps|U_ulLnnqC_mqNvxq`@

Limitations and common mistakes

Results reflect your supplied input and selected settings. Check the worked example and output before reuse.
Combined input is bounded to 150,000 characters; output text is bounded to 1.2 million characters. Some algorithms impose smaller limits, stated in their error messages.

Frequently asked questions

What format should I enter?

Paste JSON matching the structure in the example. The worked example shows the supported structure and actual output.

How can I encode or decode a coordinate polyline online?

Paste JSON matching the structure in the example. Set direction, decimal precision. Choose Run tool. Review the output, then copy or download it.

Technical references

Google Encoded Polyline Algorithm

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.