Replit security

Is my Replit app secure? Check its code and live site

Connect your Repl to GitHub and SafeWeave scans the code on each push. Then scan the URL your Repl is deployed at, to see what anyone on the internet can see.

Run a free scan Create a free account

Free scan of a public GitHub repo · no signup · private repos and live apps with a free account

Why it matters

Your Replit app works. Is it locked?

Replit gets you from prompt to working app fast. The security mistakes AI builders make don’t break anything, so you won’t see them while you click around: a table anyone can read, a secret key in the browser bundle, an API route that never checks who is calling. SafeWeave looks for exactly these.

How SafeWeave Solves It

How SafeWeave checks a Replit app

No access to your Replit account needed: SafeWeave scans the GitHub repository your project syncs to.
Each push is scanned, within your plan’s monthly scan limit, so new mistakes show up when they are made.
An App URL scan checks the deployed app from the outside, the way anyone on the internet sees it.
On Cloud and Cloud Plus, every finding comes with how to fix it and a prompt you can paste back into Replit.

What to watch for

Common security issues in Replit apps that SafeWeave checks

Secrets in the code

Provider API keys and tokens hard-coded in source, and env files in the repository holding real values instead of placeholders.

Python apps

Flask running with debug=True (or on 0.0.0.0 with debug on), SQL built with string formatting, shell commands built from strings, and unsafe pickle or yaml.load.

Express and Node APIs

CORS that allows any origin with credentials, tokens decoded with jwt.decode instead of verified, /admin routes with no auth, and cookies without httpOnly.

Databases and storage

If your Repl uses Supabase or Firebase: tables without Row Level Security, rules with no condition and public storage buckets.

AI features

AI routes with no sign-in check or rate limit, user input inside the system prompt, and model output sent to a shell, eval or raw SQL.

What your deployed Repl serves

From the outside: /.env files, the .git folder, backups, debug pages and API routes that return personal data without sign-in.

Anything checked on your live app, rather than in the code, is a live app check, on Cloud and Cloud Plus. See every check in the vibe coding security checklist.

How to scan

Scan your Replit app in four steps

1
In Replit, connect your Repl to a GitHub repository from Replit’s Git tools.
2
In SafeWeave, connect GitHub if you haven’t, then go to Repositories, click Connect repository and pick that repository.
3
Click Scan now, or wait for your next change: each sync is a push, and pushes are scanned.
4
Go to App URLs, click Scan an app URL and enter the URL your Repl is deployed at.

Full instructions: Replit in the docs. If the repository is public, you can also try a scan without an account at safeweave.dev/scan.

Code and live app

What each scan looks at

Your code, through GitHub

Connect the GitHub repository your builder syncs to. Each push is scanned, within your plan's monthly scan limit. On top of the standard scanners, 59 vibe-coded app checks look for the mistakes AI builders make with Supabase, Firebase, Next.js, Vite, Express, Stripe, AI features, Python, MCP servers and secrets.

Your live app, from its URL

An App URL scan looks at your deployed app the way anyone on the internet can: security headers, the TLS certificate, email records and exposed files. On Cloud and Cloud Plus it also runs live app checks for open tables, storage, keys and AI routes. They only read; they never change anything.

Plans

What’s free and what’s on Cloud

	Free	Cloud and Cloud Plus
Connected repositories	1	5 on Cloud, 15 on Cloud Plus
Cloud scans per repository a month	5	15 on Cloud, no limit on Cloud Plus
Vibe-coded app checks on your code	Grade and finding counts	Every finding, with how to fix it
App URL scan	Score, grade and the first findings	All findings, with how to fix them
Live app checks (open tables, storage, keys, AI routes)	No	Yes
Daily or weekly monitoring with email alerts	No	Yes
Supabase connection (RLS and security advisors)	No	Yes

Cloud is $29/month with a 14-day free trial; Cloud Plus is $59/month. See Choosing a plan.

Other builders

Built with something else?

Lovable security Bolt.new security v0 security

FAQ

Common questions

Is my Replit app secure?

Using Replit doesn’t make an app insecure on its own, but you can’t tell from using the app whether it leaves data or keys open. AI-built apps often ship the same mistakes: database tables anyone can read, secret keys in the browser and routes with no sign-in check. To find out, scan it: SafeWeave checks the code in the GitHub repository your project syncs to and the live app at its URL.

How do I check my Replit app for security issues?

Put your Replit project on GitHub, then in SafeWeave connect that repository and click Scan now; after that each push is scanned. Then scan the address your app is deployed at under App URLs. A free account covers one repository with a grade and finding counts, and an App URL scan with a score and the first findings; every finding with its fix and the live app checks are on Cloud and Cloud Plus.

Can I scan a Repl that isn’t on GitHub?

You can scan its deployed URL as an App URL, which checks the live app from the outside. To scan the code, connect the Repl to a GitHub repository from Replit’s Git tools and connect that repository in SafeWeave.

Do I need to give SafeWeave access to my Replit account?

No. You don’t connect Replit itself. SafeWeave scans the GitHub repository your Repl is connected to, and your deployed app at its URL.

Scan your Replit app

Paste a public GitHub repository and get a grade with ranked findings in seconds, no account needed. For a private repository or your live app, create a free account.

Run a free scan View on GitHub

Explore SafeWeave

Vibe coding security Security checklist Supabase RLS checker Lovable security Bolt.new security v0 security Docs: AI builder apps Pricing