Swift, minimalist developer utilities
20 precise tools for formatting, hashing, encryption and encoding — instant, client-side, no round-trips.
Formatter
Cryptography
Encoding
Generator
Utility
Image
Frequently Asked Questions
Is Syntaxly.dev safe to use for sensitive data?
Absolutely. Syntaxly is built on a 'Zero-Persistence' architecture. All processing (like AES encryption or JWT decoding) happens locally in your browser. Your data is never sent to our servers.
Why is Syntaxly faster than other online tools?
We use SvelteKit and a minimalist approach to eliminate bloat. Our tools are designed for 'Swift' performance, providing instant results as you type without server round-trips.
Does Syntaxly store my JSON or API tokens?
No. We do not use databases for your input data. Once you close the tab or refresh the page, your data is completely wiped from your browser's memory.
Featured Articles
In-depth developer guides and tool deep-dives
AES Encryption: How the World's Most-Used Cipher Works
AES is in every TLS connection, every encrypted disk, every secure messaging app. Learn how it works, what the modes mean, and how to use it correctly.
Password Hashing with Bcrypt: A Security Deep Dive
Bcrypt is the gold standard for password hashing. Learn how the cost factor provides future-proof security, why fast hashes are dangerous for passwords, and how bcrypt compares to newer alternatives.
MD5 Checksums: File Integrity Verification Guide
MD5 produces 128-bit checksums used for verifying file integrity. Learn what MD5 is good for today, where it fails, and how to use it correctly.