CRX id
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bcjindcccaagfpapjjmafapmmgkkhgoa
Description from extension meta
Makes JSON easy to read. Open source.
Image from store
Description from store
The original JSON Formatter, now with optional dark mode 🌚
Auto-formats JSON when you load it in a browser tab.
FEATURES
- Fast, even on very long JSON pages
- Dark mode
- Syntax highlighting
- Collapsible trees, with indent guides
- Clickable URLs
- Negligible performance impact on non-JSON pages (less than 1 millisecond)
- Works on any valid JSON page – URL doesn't matter
- Buttons for toggling between raw and parsed JSON
Note: this extension might clash with other browser extensions that modify the DOM before it runs. If it doesn't seem to be working, try disabling other extensions. If it clashes with an extension you need, open an issue and I'll try to find a solution.
SOME EXAMPLE JSON PAGES to try it out on:
https://callumlocke.github.io/json-formatter/
PRO TIP
Hold down control (or cmd on Mac) while collapsing a tree - collapses all siblings too.
PRIVACY
No tracking, no advertising, and nothing else nefarious.
SOURCE CODE
github.com/callumlocke/json-formatter
ISSUES
github.com/callumlocke/json-formatter/issues
WHO MADE THIS
twitter.com/callumlocke
Latest reviews
- (2025-06-28) Kiki Nikola: great extension for json ty so much !!!
- (2025-06-27) Elijah: Json formatter is not working, I've tried uninstalling it and re-installing, but I've failed
- (2025-04-21) Abu Raihan: it's very helpful for me. i can not think of viewing JSON from API without this extension
- (2025-04-17) Ali.S: Nice and simple view for JSON, but huge memory use and hanging with big JSON text
- (2025-04-03) Nenad Jankovic Paske: scam
- (2025-03-30) Sm Shohag: Dark theme/White Theme activation not working! fix this bug. Thanks
- (2025-03-18) Duy Sơn Nguyễn: cannot activate dark theme
- (2025-03-09) Henrik Jensen: This is perfect :) you see everything
- (2025-02-05) Sirial Kilorean: Life saver!
- (2025-02-05) Heechan Park: I can't live without it.
- (2025-02-03) Will Izaksorta: LOVE IT!
- (2025-01-29) Omais Mobi: If only it showed the line number then it would be perfect
- (2025-01-28) Dhananjayan Sudhakar: Truly Amazing app! Love it
- (2025-01-27) Vik Lost Stranger: Lacks guidance on how to use it to read Chat GPT or Google takeout backups in browser in readable format or convert it to HTML readable format or txt. Bad.
- (2025-01-16) Alexander Gerber: Great tool, highly recommend!
- (2024-12-27) Miiro Lernokil: helpfull for anyone who tries to read JSON
- (2024-12-25) Kikos Moktaki: A must for developers
- (2024-12-23) James Mordaki: Very helpfull!!!
- (2024-12-22) Jane Kikorl: I love it
- (2024-12-20) Modi: Helpfull and great
- (2024-12-19) // ANT //: AMAZING
- (2024-12-19) Kyle Broflo: Just Awsome
- (2024-12-18) Jarod Nienow: Just great!
- (2024-12-17) Sahil Atahar: It works very well. Its amazing
- (2024-11-30) Lynia Uth: very nice its sure help understanding certain issues i do love the options
- (2024-11-05) Choudhary Abdullah: Simple & sufficient! Using it along with SuperDev Pro.
- (2024-10-26) Jordan “gordo” Zanatta: Works beautifully.
- (2024-10-25) Wilhelm Mauch: works perfect. thank you
- (2024-10-20) Devneel Vaidya: Doesn't work - the built-in pretty print from Chrome seems to conflict with this. Will update to 5 stars once fixed.
- (2024-10-09) Jeysson Ramirez: Works perfect
- (2024-08-19) Zobaidul Kazi: The JSON Formatter by Callum Locke is an indispensable tool for anyone working with JSON data. It effortlessly transforms messy JSON strings into a beautifully formatted and easy-to-read structure, saving developers significant time and effort. The tool is intuitive, lightning-fast, and perfect for debugging or simply making JSON more readable. Whether you're dealing with large data sets or just need a quick format check, this tool is a must-have. Highly recommended for developers who regularly handle JSON data!
- (2024-06-19) Andrzej Kociuba: Works immediately after installing - no need to configure anything. Good job!
- (2024-04-19) David Wilkie: Good, but theme (in options) doesn't work, so no way to choose dark mode. An editable stylesheet would be good too as the font size and line spacing is a little too large for my liking.
- (2024-04-17) Gintas Poc.: Awesome tool, works great! It would be nice to have an option to select text colors on our own.
- (2024-04-17) Joseph Stone: Cant help but notice that mr. 1 star hasnt updated his review. not cool bruh, not cool.
- (2024-03-27) Nasib Zada: The chrome's built-in pretty print toggle conflicts with this. My suggestion would be to have some padding at the top so the chrome's pretty print stripe does not overlap the contents of the json. The 1 star is just to catch your attention, i'll surely update it to 5 when you do this urgent update.
- (2024-03-25) Mariusz Stępień: Chrome now has a "Pretty-print" option that overlaps with this extension. Please fix
- (2024-03-10) Jun Zhu: This extension is only good for small JSON file, loading forever while I tried to load a large JSON response.
- (2024-02-27) amit perane: Dude not working on long JSON response!
- (2024-02-09) Gideon McPhetrige: Works so naturally that I forget it's not just a part of Chrome. Great stuff!
- (2024-02-01) Jens Schendel: Simple and useful noch only during development. No idea why this is an extension not a built-in feature.
- (2024-01-27) Naufal Assyafiq: thanks, this very useful
- (2024-01-13) Muhammad Ahmed Fayyaz (Zack Knight): Awesome
- (2024-01-03) Father Ghh: nice ...
- (2023-12-13) Flavor Hub: Great extension! ❤️❤️🔥🔥🔥
- (2023-12-11) Paweł Komorowski: Super!
- (2023-12-06) saad el: very useful
- (2023-11-30) Jawad Shiekh: it's fine
- (2023-10-10) Rachel Howell: So good at formatting my JSONs.
- (2023-10-10) Rachel Howell: So good at formatting my JSONs.