Privacy-first tools,
built by developers.
Astound Dev Tools is a collection of 28+ free developer utilities that run entirely in your browser. No data sent to servers. No sign-up. No limits.
Privacy is not a feature.
It is the foundation.
Developers routinely paste sensitive data — API keys, JWT tokens, certificates, private keys — into online tools without knowing where that data ends up. Most web-based utilities transmit your input to a remote server for processing, creating a privacy risk and a performance bottleneck.
Astound Dev Tools flips that model. Every tool processes data entirely in your browser. Your data never touches a server. There is no backend database, no request logging, and no analytics script watching what you type.
The result is tools that are not only more private but also faster — no network round-trip means near-instant results, even for large files or complex operations.
Every developer tool
should respect your data.
We envision a web where developers never have to choose between convenience and security. Where formatting a JSON payload, debugging a JWT, or decoding a certificate does not mean trusting a third-party server with your most sensitive credentials.
Privacy-first should be the industry standard, not a premium feature behind a paywall. By proving that powerful, fast, and beautiful tools can run entirely client-side, we hope to inspire the broader developer community to demand better.
Every tool we add is a step toward that future — free, private, and accessible to every developer on the planet.
Core principles
Four commitments that shape every tool we build.
Privacy by Design
Every tool processes data locally in your browser. No data is ever sent to a server, logged, or stored. Your inputs never leave your device — this is not a configuration option, it is the only mode of operation.
Browse all toolsLightning Fast
Tools run at native browser speed with no network round-trips. Results are instant, even for large files or complex operations.
Works Offline
Once loaded, most tools continue to work without an internet connection. You are never dependent on server uptime.
Built for Developers
Created by engineers who use these tools daily. Clean interfaces, keyboard-friendly interactions, and output formatted the way you actually need it.
Developer security habits
Security principles every developer should follow — whether you use our tools or not.
Validate Before You Trust
Always inspect tokens, certificates, and payloads before using them in production. A quick decode can reveal misconfigurations that cause silent failures.
Use Strong, Unique Passwords
Generate passwords with at least 16 characters mixing upper and lowercase letters, numbers, and symbols. Never reuse credentials across services.
Rotate Keys & Tokens
Regularly rotate API keys, JWT secrets, and certificates. Set expiration dates and audit active tokens to catch stale or compromised credentials.
Audit Your Dependencies
Run regular vulnerability scans on your dependency tree. A single outdated package can open your entire application to attack.
Review SSL/TLS Certificates
Decode and verify certificate chains before deployment. Check expiration dates, SAN entries, and signature algorithms to avoid trust failures.
Prefer Client-Side Tools
When working with sensitive data like private keys or tokens, use tools that process locally in your browser. Never paste secrets into server-based utilities.
Frequently asked questions
28+ tools. Zero compromise.
Every tool runs in your browser. Your data stays with you. No accounts, no limits, no servers.