I built ExtraTools.dev, a collection of privacy-first developer tools that run entirely in the browser—no data is ever sent to a server.
I was frustrated with most online dev tools requiring data to be uploaded, even for simple tasks like Base64 encoding, JSON validation, or JWT decoding. So I made a set of tools that developers can use without worrying about privacy or server-side processing.
What’s available so far?
Base64 Encoder/Decoder
JSON Beautifier & Validator
JWT Decoder
File Extractor (convert files to binary/Base64)
Why I built this?
Many online dev tools track users, show ads, or require unnecessary data transfers.
I wanted something fast, lightweight, and privacy-friendly.
Everything runs 100% client-side—no tracking, no logs, no third-party scripts.
Would love to hear your thoughts! What other privacy-focused dev tools would be useful?
Hey HN,
I built ExtraTools.dev, a collection of privacy-first developer tools that run entirely in the browser—no data is ever sent to a server.
I was frustrated with most online dev tools requiring data to be uploaded, even for simple tasks like Base64 encoding, JSON validation, or JWT decoding. So I made a set of tools that developers can use without worrying about privacy or server-side processing.
What’s available so far? Base64 Encoder/Decoder JSON Beautifier & Validator JWT Decoder File Extractor (convert files to binary/Base64)
Why I built this? Many online dev tools track users, show ads, or require unnecessary data transfers. I wanted something fast, lightweight, and privacy-friendly. Everything runs 100% client-side—no tracking, no logs, no third-party scripts. Would love to hear your thoughts! What other privacy-focused dev tools would be useful?
Try it here: ExtraTools.dev
Looking forward to feedback!