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Nanopb is a small code-size Protocol Buffers implementation in ansi C. It is especially suitable for use in microcontrollers, but fits any memory restricted system.

The latest stable version of nanopb is 0.4.9.3, published on 2026-11-11. Verified by Vigia on 2026-11-13.

Latest stable version0.4.9.3
Published2026-11-11 12:09:13 UTC
Installpip install --upgrade nanopb
Requirespython >=2.7
LicenseZlib
Advisories on latest versionnone known
Last verified2026-11-13 06:19:57 UTC
Sourcespypi.org

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Maintenance

Activityactive
Last stable release2026-11-11 12:09:13 UTC · 1 days ago
Stable releases in the last 12 months1
Published versions182

Heuristic based only on release dates; it does not measure issue or security response times.

Version history

VersionPublished
0.4.9.32026-11-11 12:09:13 UTC
0.4.9.12024-12-01 10:45:44 UTC
0.4.92024-09-19 11:24:57 UTC
0.4.82023-11-11 08:00:05 UTC
0.4.72022-12-11 10:34:19 UTC
0.4.62022-05-30 18:02:04 UTC
0.4.5.post12021-03-22 14:49:30 UTC
0.4.5 withdrawn2021-03-22 14:39:06 UTC
0.3.9.82021-03-22 12:56:06 UTC
0.4.42020-11-25 12:52:12 UTC
0.3.9.72020-11-25 11:55:04 UTC
0.4.32020-09-23 14:44:36 UTC
0.4.22020-06-23 12:22:13 UTC
0.3.9.62020-06-23 09:00:17 UTC
0.4.12020-02-02 10:33:54 UTC
0.3.9.52020-02-02 03:39:30 UTC
0.4.02019-12-20 13:06:10 UTC
0.3.9.4.post32019-12-14 07:52:01 UTC

Showing the 18 most recent of 18 versions. JSON

Version compatibility

Newest stable version that declares support for each runtime version (from the requirements published with each version).

RuntimeNewest compatible version
python 3.80.4.9.3
python 3.90.4.9.3
python 3.100.4.9.3
python 3.110.4.9.3
python 3.120.4.9.3
python 3.130.4.9.3

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Frequently asked questions

What is the latest version of nanopb?

The latest stable version of nanopb is 0.4.9.3, published on 2026-11-11. Verified by Vigia on 2026-11-13.

How do I install the latest version of nanopb?

Run pip install --upgrade nanopb. The latest stable version is 0.4.9.3 (verified 2026-11-13).

Is nanopb deprecated?

No. nanopb is not marked as deprecated in the registry.

Which Python version does nanopb require?

nanopb 0.4.9.3 declares this requirement: python >=2.7.

Does nanopb 0.4.9.3 have known vulnerabilities?

No known advisories affect nanopb 0.4.9.3 according to the data Vigia checks.

Is nanopb still maintained?

nanopb published 1 stable releases in the last 12 months; the most recent was 1 days ago. Activity: active.

Observed changes

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