# TechWeirdo Tools > 17 free browser-based developer tools — network checks, security, generators, converters and builders. No signup, no install. TechWeirdo Tools (https://tools.techweirdo.net/) is a free suite of developer utilities built by Shounak Pal. Network tools (HTTP, DNS, Port/TLS) run through a multi-region edge on Bunny (Nearest, US, EU, Asia). Every other tool runs entirely client-side: input is processed in the browser and never uploaded. ## Network - [HTTP Request](https://tools.techweirdo.net/http-request/): Online HTTP / REST client — GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS with headers, cookies, auth and body; run from Nearest, US, EU or Asia; cURL export, redirect chain, timing, sandboxed HTML preview - [DNS Lookup](https://tools.techweirdo.net/dns-lookup/): Online nslookup/dig — A, AAAA, CNAME, MX, NS, TXT, SOA via Cloudflare, Google, Quad9, ControlD, OpenDNS or system resolver; compare regions for propagation checks - [Port & TLS Checker](https://tools.techweirdo.net/port-tls-checker/): Open port test plus SSL/TLS certificate checker — issuer, subject, validity window, days to expiry, SANs, TLS version, cipher suite - [What's My IP](https://tools.techweirdo.net/what-is-my-ip/): Shows your public IPv4/IPv6; look up any IP for ISP, ASN, city, country, timezone and map ## Security - [Hash Generator](https://tools.techweirdo.net/hash-verifier/): Client-side file and text hashing — MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA3-256, SHA3-512, BLAKE3, RIPEMD-160, CRC32; checksum verification; files never leave the device - [Bcrypt Generator](https://tools.techweirdo.net/bcrypt-generator/): Generate salted bcrypt hashes (cost 4–15) and verify passwords against existing hashes, entirely in the browser - [JWT Decoder](https://tools.techweirdo.net/jwt-decoder/): Decode JSON Web Tokens locally — header, payload, registered claims with readable dates, expiry status, HS256/384/512 signature verification ## Generate - [Password Generator](https://tools.techweirdo.net/password-generator/): Strong random passwords and word passphrases from Web Crypto randomness, with length, character sets and entropy estimate - [UUID Generator](https://tools.techweirdo.net/uuid-generator/): Generate up to 1,000 UUID v4 (random) or v7 (time-ordered) identifiers with case, hyphen and quoting options - [Random Hex Generator](https://tools.techweirdo.net/random-hex-generator/): Cryptographically secure random hexadecimal strings by byte length, individually or in bulk ## Convert & format - [JSON Formatter](https://tools.techweirdo.net/json-formatter/): Format, validate (with line/column errors), minify and sort JSON; tree view; runs locally - [Base64 Encode / Decode](https://tools.techweirdo.net/base64-encoder-decoder/): Base64 and Base64URL encode/decode with UTF-8 support; file to Base64/data URI and back - [URL Encode / Decode](https://tools.techweirdo.net/url-encoder-decoder/): Percent-encode/decode URL components and full URLs; URL parser with editable query parameters - [Timestamp Converter](https://tools.techweirdo.net/unix-timestamp-converter/): Convert Unix epoch timestamps (s, ms, µs) to ISO 8601, UTC, local and relative time, and dates back to epoch ## Build & design - [Table Generator](https://tools.techweirdo.net/table-generator/): Visual table builder with CSV/TSV/Markdown import; exports inline-CSS HTML, Tailwind, CSS classes or Markdown - [QR Code Generator](https://tools.techweirdo.net/qr-code-generator/): Custom QR codes for URLs, text, Wi-Fi, email, phone and SMS; colors, gradients, patterns, logos; PNG/SVG/WebP export; no login or watermark - [Code Playground](https://tools.techweirdo.net/code-editor/): HTML, CSS and JavaScript playground with live sandboxed preview, console, CDN resources and local project library ## Site - [Home](https://tools.techweirdo.net/): Searchable index of every tool - [About](https://tools.techweirdo.net/about/): Who builds the project and how the edge tools run - [Privacy](https://tools.techweirdo.net/privacy/): What data each tool touches, analytics and third parties ## Contact - Builder: [Shounak Pal](https://www.shounakpal.com/)