Chrome Extension CSP Builder
Chrome Extension CSP Builder — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.
About Chrome Extension CSP Builder
Chrome Extension CSP Builder is a free Chrome / browser extensions tool that lets you generate a valid manifest in a few clicks — no guesswork, no docs. Copy the manifest and paste it straight into your extension's manifest.json or source. It runs entirely in your browser with no sign-up and no installs, so your data stays private.
How to use Chrome Extension CSP Builder
- 1Open Chrome Extension CSP Builder — it loads instantly and runs entirely in your browser.
- 2Fill in the fields with your own values; the output updates live as you type.
- 3Review the generated manifest in the preview area.
- 4Copy the manifest and paste it straight into your extension's manifest.json or source.
Why use Chrome Extension CSP Builder?
- ✓Generates a valid manifest in seconds — no copy-pasting from docs
- ✓100% client-side: your inputs never leave your browser
- ✓Free and unlimited — no account, no trial, no credit card
- ✓Works on desktop and mobile; copy or download the manifest instantly
Frequently asked questions
Is Chrome Extension CSP Builder free?+
Yes. Chrome Extension CSP Builder is completely free with no account, no trial and no usage limits. ToolJolt is supported by unobtrusive ads, not paywalls.
Where do I paste the output from Chrome Extension CSP Builder?+
Click Copy, then paste the manifest into your extension's manifest.json or source. Each tool's preview shows exactly what to add and where, so you can drop it in and save without reading the docs.
Is my data private?+
Completely. Chrome Extension CSP Builder runs 100% in your browser (client-side). Nothing you type is uploaded to a server, so your data stays on your device.
Do I need to sign up or install anything?+
No. There's nothing to install and no sign-up — just open the page and start. It works on desktop and mobile.
Does this work for Manifest V3?+
Yes. The output follows current Manifest V3 conventions, which is what the Chrome Web Store requires for new and updated extensions.
Will it work in Edge, Brave or Firefox?+
Chromium browsers (Edge, Brave, Opera) use the same extension format, so the output is portable. Firefox is largely compatible but uses the browser namespace for some APIs.
Can I use the output commercially?+
Yes. The configuration, code or files you generate are yours to use in personal and commercial projects without attribution.
Related Platform tools
Chrome Match Pattern Builder & Tester
Chrome Match Pattern Builder & Tester — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.
● LiveChrome Extension Permissions Picker
Chrome Extension Permissions Picker — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.
● LiveChrome Omnibox Keyword Config Builder
Chrome Omnibox Keyword Config Builder — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.
● LiveWeb Extension _locales messages.json Builder
Web Extension _locales messages.json Builder — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.
● LiveChrome declarativeNetRequest Rule Builder
Chrome declarativeNetRequest Rule Builder — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.
● LiveSlack Custom Emoji Pack Manifest
Slack Custom Emoji Pack Manifest — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.
● Live