NDT Toolkits

Get UID

Extract numeric user ID from a Facebook profile URL (mobile parsing or external API).

Open

Generate OTP

Generate 6-digit TOTP from Base32 secret; verify OTP.

Open

HOTP Generator

Generate HOTP by secret + counter

Open

QR Provisioning

Build & scan otpauth:// (client-side)

Open

Recovery Codes

Generate printable one-time backup codes

Open

Providers (Steam/Battle.net/Adobe)

Preset algorithms for common apps

Open

List Cleaner

Trim/Dedup/Filter lines

Open

Proxy/SOCKS Checker

Check proxy live/die in batch with progress and download.

Open

IP → Location

Batch IP geolocation (country, city, ISP, ASN…).

Open

UUID / NanoID

Generate unique IDs quickly

Open

Base64 encode/decode

Client-side

Open

Javascript Obfuscator

Client-side Javascript Obfuscator Tools

Open

Hashing (MD5/SHA1/SHA256)

Client-side hashing

Open

Password Hashing

Password hashing

Open

UTM Builder / URL Parser

Build & parse URLs

Open

QR Code Generator

Client-side (qrcode.js)

Open

Regex Tester

Test & highlight

Open

Password Generator

Strong passwords with options

Open

EXIF Stripper

Remove metadata (client-side)

Open

Security Headers Generator

Nginx/Apache snippets

Open

URL Unshortener

Follow redirects, show final URL & hop chain.

Open

YouTube Thumbnails

Get all thumbnail sizes by URL/ID.

Open

Slugify / Remove diacritics

VN friendly convert.

Open

Text Tools

Trim / sort / unique / de-duplicate.

Open

Base Encoders

Base32 / 58 / 62 / 64.

Open

UNIX Time Converter

Epoch ↔ DateTime (UTC/local).

Open

JWT Sign/Verify (HS256)

For test only.

Open

Lorem Ipsum

Advanced placeholder text generator.

Open

JSON Formatter / Beautify

Auto-detect JSON.

Open

Formatter / Beautify

Auto-detect HTML/PHP/JS/JSON.

Open

Timestamp Converter

Advanced epoch ⇄ datetime.

Open

Cron Builder

Build cron + next runs.

Open

HTML & URL Encode/Decode

Entities & URL tools (combined).

Open

JSON ⇄ CSV ⇄ YAML/TOML

Convert & pretty-print (naive YAML/TOML parse).

Open

Markdown ⇄ HTML

Bi-chiều, parser đơn giản.

Open

Text Diff Viewer

So sánh 2 đoạn text, +/−/= theo dòng.

Open

Barcode Generator

EAN-13 (check digit) & Code39 (client-side).

Open

SSH Keygen Pro

Generate OpenSSH/RSA/ECDSA/Ed25519 (+PPK)

Open

Fake Name & Address

Generate fictional data (vi_VN default).

Open

IBAN Generator

Random valid IBAN

Open

IBAN Validator

Offline mod97 check

Open

Card Validate

Luhn & network detection (offline).

Open

BIN Lookup

BIN/IIN details via binlist, with cache.

Open

Test Cards

Official sandbox cards (Stripe, Adyen, …)

Open

Paypal Fee Calculator

Official Paypal Fee Calculator

Open

HTTP Headers

HEAD request

Open

Redirect Checker

Follow up to 5 hops

Open

WHOIS Lookup

Domain WHOIS

Open

DNS Lookup

A/AAAA/MX/NS/TXT

Open