How to share your startup on r/javascript

TL;DR

r/javascript is a free subreddit with about 2.45 million members (September 2026) for discussion of JavaScript, TypeScript and related projects. Sharing your own content is allowed as long as it stays a minority of your activity, and rule 7 states: "Advertising paid products and services is prohibited." It suits founders with an open-source library, a code demo or a technical write-up.

How we checked: we read these rules through public subreddit trackers in October 2026. Read the sidebar and the pinned posts before you post, since moderators update the rules.

What is r/javascript?

JavaScript is the programming language of the web browser, and it also runs on servers through Node.js. TypeScript adds types on top of JavaScript, and the subreddit counts it as in scope. r/javascript gathers developers who discuss the language, libraries, frameworks and tooling. The sidebar asks members: "Please keep self promotion to a minimum/reasonable level."

The subreddit has seven rules:

1. Excessive Self-Promotion: sharing your own content is fine, as long as it is not most of what you contribute.
2. Where's the Javascript?: demos need code alongside them, so people have something to discuss.
3. /r/JavaScript is not a support forum: help requests go to r/LearnJavascript.
4. Java !== Javascript: Java is a different language and off topic here.
5. Remember the human: argue with ideas, never with people.
6. Low-effort content: listicles, memes and clickbait are banned.
7. Advertising: paid products and services may not be advertised.

Who should post on r/javascript?

Good fit:

• Developer tool startups with an open-source library, SDK or package that developers can install and read.
• Founders who can write a technical post: a performance benchmark, an architecture decision, a hard bug and its fix.
• Teams that already take part in the community and share their own work now and then.

Skip it:

• If your product is a paid SaaS with no code to inspect: rule 7 bans advertising paid products and services.
• If you need help with your own code: rule 3 sends you to r/LearnJavascript.
• If you plan a "10 best tools" list: rule 6 bans listicles.
• If you want SEO: links in Reddit posts carry nofollow, and the DA 95 belongs to reddit.com.

How much does r/javascript cost?

Posting is free. Rule 7 bans advertising inside the subreddit, so paid reach on Reddit goes through Reddit Ads, which runs separately from the community.

How do you share your startup on r/javascript?

1. Open r/javascript, join, and read the rules. Comment on other people's posts for a while, so your own links stay a minority of your activity, as rule 1 asks.
2. Post the code: a GitHub repository, an npm package or a live demo with its source. Rule 2 removes demos that offer no JavaScript to discuss.
3. Write a short text with the problem, the approach, the trade-offs and the numbers (bundle size, speed, browser support), and answer technical questions in the comments. Leave pricing and sales copy out of the post.

Tips to get more out of r/javascript

• Lead with the code, and mention your company only as the team behind it.
• Show benchmarks with the method: hardware, versions and the script, so readers can reproduce them.
• Explain one decision in depth, such as why you dropped a framework or how you cut bundle size by 40%, and skip the feature tour.
• Keep a ratio: for every post about your own project, write several helpful comments on other posts.

Our verdict

r/javascript puts open-source and technical work in front of about 2.45 million developers at no cost. It fits developer tool startups that publish code and teach, and it closes the door on ads for paid products.

More options: see all subreddits for founders. Planning the launch around this listing? The Fe/male Switch startup game walks women founders from idea to first customers.