Release Note 🎉

🔍 Payload Inspector & UI Refresh Update

This release introduces a powerful payload inspector with diff comparison and JSON tree view, refreshed UI for Desktop and Web, enhanced copy capabilities, and fixes for community-reported topic subscription issues.

Features 🌈

Desktop,Web:

• Add quick copy options for topic, broker, and host information.
• Add topic whitespace detection setting to warn about leading/trailing spaces.

Desktop:

• Add payload inspector with diff view to compare payload changes between messages.
• Add JSON tree view for structured payload visualization and navigation.
• Add configurable max payload display size setting.

Web:

• Add syntax highlighting for JSON payload display.

Desktop,CLI:

• Upgrade protobufjs to support Protobuf Editions 2023.

Improvements 💫

Desktop,Web:

• Refresh UI with modernized styling, smoother animations, and better visual consistency.
• Simplify connection list selected state styling.
• Redesign "Everything about MQTT" help page with modern layout.
• Redesign About page with modern layout and EMQX Platform promotion.

Desktop:

• Upgrade Electron from 33.4.11 to 39.2.7 for better performance and security.
• Add portable version for Windows (no installation required).
• Improve cross-platform compatibility and fix script dependencies.

Fixes 🛠

Desktop:

• Fix macOS 26 Tahoe performance issue by upgrading Electron.
• Fix inconsistent state when editing disabled topic (#2007).
• Fix Enter key inserting newline in topic input causing subscription errors (#2001).
• Fix Meta button red dot position issue after configuring properties.
• Fix topic whitespace detection issue.

Web:

• Fix topic input forced line break in publish area.
• Fix topic input and select styling issues.

Desktop,Web:

• Prevent newlines in topic and alias textarea inputs.

Preview 🖼

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What's Changed

• fix(inspector): address UI/UX issues by @muzaffarmhd in #1979
• feat(viewer): add advanced dashboard view with widget configuration by @muzaffarmhd in #1987
• fix(dashboard): fix bug - add missing prop by @muzaffarmhd in #1996
• ci(win): add portable version for windows by @zfb132 in #2002
• feat: add syntax highlighting for JSON payload in web version by @nktnet1 in #2004
• feat: upgrade protobufjs to support Protobuf Editions 2023 by @ysfscream in #2010
• style: normalize quotes and formatting in web theme files by @ysfscream in #2011
• chore: improve cross-platform compatibility and fix script dependencies by @ni00 in #2014
• feat: add topic whitespace detection setting by @ysfscream in #2017
• fix: improve topic input layout using flexbox by @ysfscream in #2020
• feat: add separate copy options for message payload and topic by @ysfscream in #2019
• fix(subscriptions): prevent newlines in topic and alias textarea inputs by @ysfscream in #2018
• fix(web): fix topic input and select styling issues by @ysfscream in #2021
• chore: upgrade Electron from 33.4.11 to 39.2.7 by @ysfscream in #2022
• fix(subscriptions): fix inconsistent state when editing disabled topic by @ysfscream in #2023
• chore: hide dashboard tab by @ysfscream in #2024
• chore: enable npm trusted publishing by @ysfscream in #2025
• feat(ui): simplify connection list selected state styling by @ysfscream in #2026
• feat(ui): redesign Everything about MQTT help page by @ysfscream in #2027
• feat(ui): redesign About page with modern layout and EMQX Platform promotion by @ysfscream in #2028
• feat(settings): add configurable max payload display size by @ysfscream in #2029
• 1.13.0 by @ysfscream in #2030

New Contributors

• @zfb132 made their first contribution in #2002
• @nktnet1 made their first contribution in #2004

Full Changelog: v1.12.1...v1.13.0