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Mqtt Topic Matcher

Match MQTT level-aware +/# and $share/group/filter with case-sensitive UTF-8 names. Empty levels are meaningful; leading wildcards do not match $-prefixed system topics. Shared subscriptions change grouping, not filter matching. This is not a broker/QoS/authorization check. 32 KiB each / 100 filters × 100 topics / 100 levels / 4,096 bytes per name.

mqtt-topic-matcherLOCAL WORKSPACE

Enabling local controls…

Inputs and settings

Processed in this tab without uploading or storing inputs. Each text field is limited to 32 KiB and complete output to 1 MiB; additional format and model limits apply.

Results

Review the settings and run. Editing inputs clears old results.

Processing model and limits

Match MQTT level-aware +/# and $share/group/filter with case-sensitive UTF-8 names. Empty levels are meaningful; leading wildcards do not match $-prefixed system topics. Shared subscriptions change grouping, not filter matching. This is not a broker/QoS/authorization check. 32 KiB each / 100 filters × 100 topics / 100 levels / 4,096 bytes per name.

Data and model checked: OASIS MQTT 5.0 ↗Source tool controls ↗

How to use this tool

Load the example, confirm field units and processing rules, then run locally. Editing any input clears the old result. Copy or download the complete output explicitly.

When not to use it

Match MQTT level-aware +/# and $share/group/filter with case-sensitive UTF-8 names. Empty levels are meaningful; leading wildcards do not match $-prefixed system topics. Shared subscriptions change grouping, not filter matching. This is not a broker/QoS/authorization check. 32 KiB each / 100 filters × 100 topics / 100 levels / 4,096 bytes per name.