# Generating images from base64 encoded string

**URL:** <https://forum.alumio.com/t/generating-images-from-base64-encoded-string/2690>\
**Category:** Data Transformers\
**Created:** [December 15, 2025, 11:40am UTC](https://forum.alumio.com/t/generating-images-from-base64-encoded-string/2690 "2025-12-15T11:40:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Bas.T](https://forum.alumio.com/letter_avatar_proxy/v4/letter/b/a6a055/32.png) [@Bas.T](https://forum.alumio.com/u/Bas.T)\
**Post date:** [December 15, 2025, 11:40am UTC](https://forum.alumio.com/t/generating-images-from-base64-encoded-string/2690/1 "2025-12-15T11:40:59Z")

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Hey there,

I’m currently working on a flow that retrieves images and their respective names through a rest API endpoint. And I should then in turn convert these into images and upload those to a FTP server. What would be the most efficient way to tackle this?

Thanks in advance.

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**Author:** ![Gugi](https://forum.alumio.com/user_avatar/forum.alumio.com/gugi/32/236_2.png) [@Gugi](https://forum.alumio.com/u/Gugi)\
**Post date:** [December 16, 2025, 2:22pm UTC](https://forum.alumio.com/t/generating-images-from-base64-encoded-string/2690/3 "2025-12-16T14:22:09Z")

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Hi @Bas.T

You can use the “String: Base64 decode” mapper in the “Write files to a filesystem” publisher or “Write a file to a filesystem” transformer.

 ![image](https://alumio-forum.s3.dualstack.eu-central-1.amazonaws.com/uploads/original/2X/6/640a00083a49aa9d832a978d72be923e70f95d5c.jpeg)

The mapper will convert the base64 encoded string into the image (binary).

Please give it a try and let me know if you find any issues.