Launched this week
JsonMind
Developer tools that run entirely in your browser
1 follower
Developer tools that run entirely in your browser
1 follower
JsonMind is a free workspace of browser-based tools for JSON, APIs, encoding, hashing, JWT, images and documents. Paste data, get a result, and keep sensitive input on your device. No sign-up, no upload, plus practical developer guides.
Free
Launch Team
Render Sandboxes: a computer for every agentGive every agent its own machine. Starts in under a second
Promoted
Hey Product Hunt - I built JsonMind because most online developer tools still ask you to paste production data into someone else's server.
JsonMind is a single workspace with a growing set of utilities for the small, repetitive jobs that break a debugging session: formatting a JSON payload, decoding a JWT, checking a Base64 string with Chinese text, comparing a timestamp, inspecting an EXIF block, or compressing an image before attaching it to a ticket. Everything runs in the browser. There is no sign-up, no upload, and no paywall on the core tools.
A few details that took the most work:
Correct UTF-8 handling for multi-byte text in Base64 and URL encoding.
JSON errors that point to the actual line instead of a generic parse failure.
A verification checklist and common-mistake section on each tool page, because the tool is only half the job.
Long-form guides for errors people actually search for, such as HTTP 429 retries, YAML indentation, and idempotency keys.
It is free today. Pro workflows for saved and batch processing are planned, but the core tools will stay usable without an account.
I would love feedback on two things: which tool is missing from your daily workflow, and where the output or error message is still unclear. I will be in the comments all day.