JSONer - JSON Viewer & Formatter

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Overview

Fast, private JSON & JSONP viewer: highlighting, collapsing, 30+ themes, dark mode. Nothing leaves your browser.

JSONer makes JSON readable. Open any JSON or JSONP response and get an instant, collapsible, syntax-highlighted tree instead of a wall of text. • Automatic - activates on any JSON/JSONP page, no clicking required • Collapsible nodes, line numbers, and one-click raw/parsed toggle • 30+ themes including full dark mode • Fast on large documents • 100% private - parsing happens locally in your browser. JSONer sends your data nowhere and requires no account. JSONer is an actively maintained, Manifest V3 rebuild of the classic open-source "JSON Viewer" by Túlio Ornelas, updated to keep working in current Chrome. Open source under the MIT license.

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Details

Version
1.0.0
Updated
August 15, 2026
Flag concern
Offered by
TechCauldron
Size
313KiB
Languages
English
Developer
Email
hello@supportutils.com
Non-trader
This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

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