u/jana_0102

Hey everyone,

Like most of you, I constantly need to format JSON, decode JWTs, check diffs, or encrypt strings during my day-to-day work. But pasting proprietary code or sensitive keys into random, ad-heavy websites always felt like a massive security risk.

I couldn't find a comprehensive, privacy-first solution, so I built CipherKit (cipherkit.app).

It’s a suite of 77+ developer and cryptography tools designed entirely around privacy.

The core focus:

• 100% Client-Side: Everything runs locally in your browser. I built it using vanilla JavaScript, HTML, and CSS to ensure there is no server-side processing. Your data never leaves your device.
• No Login & Free: No paywalls, no accounts required.
• Clean UI: Dark mode by default, built for fast keyboard navigation.

Some of the tools included:

• Crypto Hub: AES Encryption/Decryption, RSA, SHA Hash Generators.
• Encoding Hub: JWT Debugger, Base64, URL Encoding.
• Dev Hub: Interactive Text Diff & Merge, JSON Formatter & Validator.
• Converter Hub: CSV to JSON, DOCX to HTML.

I’m Jana, and I built this to scratch my own itch, but I’m hoping it helps some of you keep your workflows a bit more secure.

I'd love to hear your feedback on the UI, any bugs you find, or tools you think I should add next.

Link: cipherkit.app