ZeroData Tools
Tools
JSON to CSV Custom Map nested JSON arrays into clean CSV files by visually selecting the exact columns you want. JSON Formatter Format and validate JSON instantly with no uploads, no server calls, and no stored data. JSON Validator Validate JSON instantly before deploys with local processing and zero server calls. YAML Validator Validate YAML files and catch indentation errors instantly with no uploads or backend processing. Base64 Encoder Encode or decode Base64 strings instantly with zero uploads. URL Encoder Encode and decode query parameters locally for APIs, redirects, and forms. HTML Formatter Pretty-print messy markup and inspect structure without exposing page code. CSS Minifier Shrink stylesheets for production with browser-only processing and instant output.
About

About ZeroData Tools

A complete, end-to-end suite of development and DevOps tools that run 100% in your browser — built by a DevOps engineer who couldn't find a tool suite he could trust with production data.

Hi, I'm Bharat Kumar — a DevOps engineer

Every single day, my work puts sensitive data in front of me: production JWTs, private SSH keys, client certificates, .env files, database connection strings, raw access logs. And every time I needed to debug, decode, convert, or generate any of these, the internet gave me the same bad options — online tools that quietly take your input, send it to their servers, and store it on machines I knew nothing about.

I was standing in the middle of a production incident needing to inspect a token, and I refused to paste live credentials into somebody else's backend. I went looking for what should obviously exist: a private, secure environment where developers can use everyday tools without a single byte leaving their machine. It didn't exist. Nothing end-to-end, nothing complete — just isolated single-purpose pages, or tools that demanded uploads, accounts, and a level of trust I wasn't willing to give.

So I built it myself.

What ZeroData Tools is

ZeroData Tools is a complete suite of 119 developer and DevOps tools that run entirely in your browser: JWT debugging and signature verification, certificate and CSR inspection, Docker, Nginx, and systemd configuration generators, SSH tooling, log analysis, JSON/CSV/YAML conversion, secret scanning, and much more — everything you need across a real development workflow.

The rule is simple and non-negotiable: nothing you paste, type, or upload is ever stored on a server — because there is no server on the processing path at all. All processing happens locally, on your device, inside your browser. You can open your browser's Network tab and watch it yourself: after the page loads, your data goes nowhere.

Who this is for

Developers and DevOps engineers who handle production data and can't risk it — the people debugging tokens during incidents, generating configs for live infrastructure, inspecting certificates for customers, and sanitizing logs before sharing them. If your input could cause damage if it leaked, this suite was built for you.

How the content is made

Every guide in the blog comes from real operational work — actual incidents, real debugging sessions, and production-hardened configurations, written for working engineers rather than for search engines. Every tool is tested across Chrome, Firefox, and Edge before it ships, and when something can be better, fixes ship fast.

The suite is free, requires no login, and has no artificial limits. The site itself is supported by site-level ads and aggregate analytics to keep development sustainable — but they never touch the content you run through the tools.

Built by Bharat Kumar

ZeroData Tools is built and maintained by Bharat Kumar, a DevOps engineer focused on secure, performance-optimized tooling for people who work with production systems. While the core utilities process data strictly client-side to ensure privacy, the overall site is supported by advertisements via Google AdSense and uses site-level analytics to improve the product experience.

Directories & Listings

ZeroData Tools is listed and verified on SaaSHub as an approved, privacy-first alternative for developer utilities.

Talk to me

Found a bug? Need a tool that doesn't exist yet? Want to know how something works under the hood? Reach out at [email protected] — I read and answer every message myself.