TOOLERY
Free Online Tools
 Admin login

Free Online Developer Tools

A growing toolbox of fast, free utilities for developers and sysadmins — no account, no login, no clutter.

Encoder
Base64, URL & hex encode / decode
Time Converter
Timestamp & timezone converter
JWT Decoder
Decode a JWT header & payload locally
Regex Tester
Test regex with live match highlighting
Hash Generator
MD5, SHA-1/256/512 & HMAC hashes
JSON Tools
Validate, format & find JSON paths
Diff Tool
Line-by-line text comparison
CSV Viewer
View CSV as a sortable, filterable table
Email Headers
Analyze email routing & SPF / DKIM / DMARC
Port Scanner
Check whether TCP/UDP ports are open on a public host
DNS Propagation
Check how a domain resolves across 16 global DNS resolvers
DNS & Email
DNS records, SPF / DKIM / DMARC, blacklist & reverse-DNS lookups
About Toolery

Toolery is a free collection of small, focused tools for developers, sysadmins and anyone who works with text and data. Every text and data utility runs entirely in your browser — what you paste is never uploaded, logged or stored, which makes them safe for tokens, keys and other sensitive input.

The set covers everyday jobs: encoding and hashing, inspecting JWTs and JSON, testing regular expressions, comparing text, reading CSV and analysing email headers. A few network tools — DNS lookups, DNS propagation and an open-port checker — run from our server to show how a domain or host looks from the public internet. No registration is ever required.