Private by default
Passwords, hashes, tokens, JSON, QR codes and editor code are processed in your browser and never uploaded.
NewJSON, Base64, JWT, URL, timestamp & password tools6 new tools added
Free developer tools
Free developer tools
without the sign-up wall.
Send HTTP requests, check DNS and SSL, format JSON, decode JWTs, hash files and design QR codes — 17 fast utilities that open instantly and keep your data in your browser.
No account
Local-first processing
Edge checks from US, EU & Asia
Free forever
Network & API
Run real requests from the edge, not your laptop.
4Edge
HTTP Request
Compose GET, POST, PUT and DELETE requests with headers, auth and body. Inspect status, timing, redirects and a cURL command.
Send API requests from US, EU or Asia
Open toolEdge
DNS Lookup
Query A, AAAA, CNAME, MX, NS, TXT and SOA records through Cloudflare, Google, Quad9 and more, from three regions.
A, MX, TXT and NS records via 6 resolvers
Open toolEdge
Port & TLS Checker
Test up to 10 TCP ports from the internet and inspect TLS certificates: issuer, expiry countdown, SANs, protocol and cipher.
Open ports and SSL certificate details
Open toolLive
What's My IP
See your public IPv4 and IPv6 address, or look up any IP for ISP, ASN, city, timezone and an approximate map.
Public IPv4/IPv6, ISP, ASN and location
Open toolSecurity
Hashes, password storage and tokens — processed locally.
3Local
Hash Generator
Hash files of any size or plain text with SHA-256, SHA-512, SHA-3, MD5, BLAKE3 and more, then verify a checksum.
SHA-256, MD5, SHA-3 for files and text
Open toolLocal
Bcrypt Generator
Create salted bcrypt hashes with a chosen cost factor, or check a password against an existing hash — locally.
Hash and verify bcrypt passwords
Open toolLocal
JWT Decoder
Decode JSON Web Tokens instantly. See header and payload, human-readable exp/iat/nbf times, and verify HMAC signatures.
Decode tokens, check expiry and claims
Open toolGenerators
Cryptographically secure values from Web Crypto.
3Local
Password Generator
Generate strong passwords or memorable passphrases with Web Crypto randomness, with entropy shown for every option.
Strong random passwords and passphrases
Open toolLocal
UUID Generator
Generate up to 1,000 UUID v4 or time-ordered v7 identifiers with case, hyphen and quote formatting.
Bulk UUID v4 and v7 identifiers
Open toolLocal
Random Hex Generator
Create cryptographically secure hexadecimal strings by exact byte length — for secrets, tokens, nonces and test data.
Secure hex strings by byte length
Open toolConvert & format
Everyday encoding, formatting and time conversions.
4Local
JSON Formatter
Pretty-print, validate and minify JSON with exact error positions, key sorting and an interactive tree view.
Format, validate and minify JSON
Open toolLocal
Base64 Encode / Decode
Encode or decode Base64 and Base64URL with full UTF-8 support. Convert files to data URIs and back.
Text and files to and from Base64
Open toolLocal
URL Encode / Decode
Percent-encode or decode text and URLs, and break any URL into its scheme, host, path and query parameters.
Percent-encode and parse URLs
Open toolLocal
Timestamp Converter
Convert Unix timestamps in seconds, milliseconds or microseconds to ISO 8601, UTC and local time — and back.
Unix epoch to human dates and back
Open toolBuild & design
Make tables, QR codes and front-end experiments.
3Local
Table Generator
Design tables visually, import CSV or Markdown, and export clean inline-CSS, Tailwind, class-based HTML or Markdown.
HTML, Tailwind and Markdown tables
Open toolLocal
QR Code Generator
Design branded QR codes for URLs, Wi-Fi, email, phone and SMS with colors, gradients and a logo. No watermark.
Custom QR codes with logo, SVG and PNG
Open toolLocal
Code Playground
Write HTML, CSS and JavaScript with a live sandboxed preview, console, CDN libraries and a local project library.
HTML, CSS and JS with live preview
Open toolNo tools in this category.
Why TechWeirdo Tools
Built for the moment you need one answer.
Not another dashboard to manage. Open a tool, get the result, move on — with sensible defaults and nothing standing in the way.
Real internet vantage points
HTTP, DNS and TLS checks run on an edge network, so you see what the public internet sees — from the US, Europe or Asia.
Instant and free
No account, trial, watermark or “sign up to continue” modal. Pages are tiny and load fast on any connection.
Keyboard-first
Press ⌘K or / anywhere to jump between tools. Every tool works on mobile too.
17focused tools
0accounts required
3edge regions
100%free to use
Are TechWeirdo Tools really free?
Yes. Every tool is free to use with no account, no trial, no watermark and no usage paywall.
Is my data uploaded to a server?
Not for local tools. Hashing, bcrypt, JWT decoding, passwords, UUIDs, hex, JSON, Base64, URL, timestamps, tables, QR codes and the code playground run entirely in your browser. Only the HTTP, DNS and Port & TLS tools send the request you start to our edge network, and What’s My IP queries public IP services. Details are on the privacy page.
Do I need to install anything?
No. The tools run in any modern browser on desktop or mobile. You can install the site as an app from your browser menu if you want a shortcut.
Which regions do the network tools run from?
HTTP and DNS checks can run from the nearest edge location or be pinned to the United States, Europe or Asia. Port and TLS checks run on the global edge.
Who builds TechWeirdo Tools?
TechWeirdo Tools is a one-person project by Shounak Pal, a doctor who codes. The tools are the same ones he uses for his own work. Read the story.
Missing a tool you reach for every week?
Suggest it. Small, useful utilities that respect your time are always welcome.