48

Image Watermarker - Online Add Text or Logo to Photos

Protect your images by adding a text or image watermark. Adjust transparency, position, and rotation. All image processing is done locally; no upload to server.

Image Tool copyright image protect watermark

46

Caesar Cipher Encoder & Decoder - Online Shift Cipher Tool

Encrypt and decrypt messages using the classic Caesar cipher with configurable shift key. Fun for puzzles and basic cryptography lessons. Entirely browser-based.

Encoder/Decoder Caesar cipher decoder encoder shift

41

Strong Password Generator - Online Random Secure Passwords

Generate ultra-secure, random passwords with configurable length and character sets. Created entirely on your device; never transmitted or stored.

Generator generator password random security

39

String Obfuscator - Online Text Encoder to Hide Content

Obfuscate strings using simple techniques to prevent casual reading. Useful for hiding spoilers or email addresses from bots. Decode with the same tool.

Security encode hide obfuscator protect

38

Password Pwned? Checker - Online k‑Anonymity

Check if a password appears in the Have I Been Pwned database using k‑Anonymity. Only the first 5 characters of the hash are sent.

Security breach checker password pwned

38

Online Hash Generator - MD5 SHA1 SHA256 CRC32 Checksum

Generate cryptographic and checksum hashes for any text string. Supports MD5, SHA-1, SHA-256, and CRC32. All hashing runs locally for maximum privacy.

Developer Tools checksum hash MD5 SHA256

37

Email Header Parser - Online Analyze Email Delivery Path

Paste raw email headers and get a human-readable breakdown of the delivery route, authentication results, and delays. Private analysis.

Network DKIM email header parser SPF

37

Phishing Email Checker - Online Suspicious Link Analyzer

Paste email headers or body text to quickly spot phishing signs, suspicious domains, and obfuscated links. Educational and private.

Email email link phishing security

36

Pronounceable Password Generator - Online Easy to Say

Create secure passwords that look like gibberish words but are easy to pronounce and remember. Mix of syllables. Local generation.

Generator generator password pronounceable secure

36

Browser Fingerprint Viewer - Online See Your Unique ID

Generate a hash showing how trackers can fingerprint your browser (canvas, WebGL, fonts). Educational and privacy‑aware.

Info browser canvas fingerprint privacy

36

SSL Certificate Checker - Online TLS Expiry & Info Tool

Inspect any website's SSL/TLS certificate details: issuer, expiry date, subject, and SANs. Verify certificate chains. All checks are private and require no server upload.

Network certificate expiry SSL TLS

36

ROT13 Encoder & Decoder - Online Caesar Cipher ROT13

Easily apply ROT13 cipher to obfuscate or reveal text. A classic letter substitution cipher that works bidirectionally. Purely client-side processing.

Encoder/Decoder cipher decoder encoder ROT13

35

Pronounceable Random Password - Online Secure & Readable

Create a random long password that alternates consonants and vowels to mimic a pronounceable word. XKCD meets CVCV. Local.

Generator generator password pronounceable secure

35

Password Strength Story - Online Visual Narrative

Evaluate password strength through a short interactive story where each character set adds lines to a narrative. Educational fun.

Educational education password story strength

35

Email Obfuscator - Online Protect Address from Bots

Hide your email address from scrapers by encoding it using HTML entities and CSS tricks. Still clickable for real users. Local generator.

Generator anti‑spam email encode obfuscator

35

Browser Extension Headers Check - Online Detect Injected Scripts

Look at HTTP headers and JavaScript objects to guess which browser extensions might be installed. For awareness.

Info browser checker extension privacy

35

2FA QR Code URI Generator - Online TOTP Key Maker

Generate a standard otpauth:// URI and QR code for authenticator apps. Set issuer, account, and secret. All local.

Generator 2FA generator QR TOTP

35

JWT Debugger - Online JSON Web Token Decoder & Verifier

Decode the header and payload of a JSON Web Token (JWT) without verifying the signature. Inspect claims securely on the client side. Great for developers.

Developer Tools debugger decoder JWT token

35

Online EXIF Metadata Viewer - Photo Detail Inspector

Extract and view EXIF data from photos including camera settings, GPS location, and timestamps. All metadata read locally, your photos stay private.

Image Tool EXIF metadata photo viewer

34

TOTP Generator (Offline) - Online Two‑Factor Code

Generate Time‑based One‑Time Passwords locally by entering a base32 secret. Verify your authenticator setup without a phone.

Generator 2FA generator secret TOTP

34

Weak Password Dictionary Check - Online Top 10k List

Compare your password against a built‑in list of the 10,000 most common passwords. Instant warning if it appears.

Security check dictionary password weak

34

HTML Sanitizer - Online Clean Dangerous Tags & XSS Prevention

Strip dangerous HTML tags and attributes (scripts, onclick) to prevent XSS attacks. Safe iframe preview. Local sanitation engine.

Developer Tools clean HTML sanitizer security XSS

33

Cross‑Origin Isolation Checker - Online COOP/COEP Test

Check if your site is cross‑origin isolated by examining the COOP and COEP headers. See if SharedArrayBuffer is available.

Diagnostic COEP COOP cross‑origin isolation

33

Iframe Sandbox Configurator - Online Test Permissions

Build an iframe with different sandbox flags and see live which features are blocked. For secure embedding.

Developer Tools iframe sandbox security test

33

XKCD‑Style Password Generator - Online Correct Horse Battery Staple

Create a strong, memorable password using 4 random common words. The famous xkcd method. Local wordlist.

Generator generator memorable password xkcd

33

.htaccess Password Generator - Online Apache Auth Creator

Generate encrypted passwords for .htaccess basic authentication. Create .htpasswd entries using bcrypt, MD5, or SHA. Server admin utility, local compute.

Developer Tools Apache generator .htaccess password

33

Random String Generator - Online Alphanumeric Randomizer

Create random strings of any length using custom character sets. Perfect for generating API tokens, salts, and unique codes. Fully client-side secure.

Generator generator random string secret token

32

Web Crypto Key Generator - Online Generate RSA/EC Keys

Generate cryptographic key pairs using the Web Crypto API. Export as JWK or raw. No server needed; pure security.

Generator generator key RSA Web Crypto

32

Certificate Signing Request (CSR) Generator - Online

Generate a CSR and private key pair in the browser using the Web Crypto API. Download both as files. No data sent to server.

Developer Tools certificate CSR generator SSL

32

SPF Record Generator - Online Email Authentication DNS

Build a valid SPF TXT record by selecting mail servers, IPv4/IPv6 ranges, and includes. Validate syntax and get ready‑to‑publish output.

Network authentication DNS email SPF

32

Text Watermark on Image - Online Add Subtle Overlay

Add a repeating diagonal text watermark to your images. Adjust opacity, font, and color. Protect your photos locally.

Image Tool copyright image text watermark

32

Password Bit Strength Visualizer - Online Security Meter

Type a password and see a bar that fills based on estimated bits of entropy. Color‑coded feedback. No storage.

Security entropy password strength visualizer

32

Shift Cipher Encoder - Online Caesar & ROT0‑25

Apply a classic Caesar shift cipher with any key. Encrypt or decrypt text instantly. Brute force option included.

Encoder/Decoder Caesar decoder encoder shift cipher

32

Local Password Vault - Online Encrypted Browser Storage

Store passwords and notes encrypted with a master passphrase. Data lives only in your browser's localStorage. No cloud.

Productivity encrypted local password vault

32

Cookie Consent Banner Generator - Online GDPR/CCPA HTML & CSS

Create a custom cookie consent banner with text, button styles, and colors. Copy the ready‑to‑use HTML/CSS/JS snippet.

Developer Tools CCPA cookie consent GDPR generator

32

String to Escaped HTML - Online Protect Against XSS

Instantly convert plain text into HTML‑safe escaped characters for secure display in web pages. Prevent cross‑site scripting. All processing local.

Developer Tools encode HTML escape security XSS

32

Password Strength Checker - Online Meter & Analyzer Tool

Evaluate the strength of your passwords with a visual meter and detailed feedback. Check for length, complexity, and breached passwords. All analysis is client-side.

Security checker password strength security strength

31

Default Wi‑Fi Password Calculator - Online ISP Router Keygen

Enter a router's MAC address or serial and generate the common default WPA passphrase for major ISP brands. Educational purpose only.

Network generator password router Wi‑Fi

31

Text Watermark Tile Generator - Online Pattern Overlay

Create a repeating text pattern from a short string for watermarking documents or images. Download SVG pattern.

Image Tool pattern text tile watermark

31

Password Policy Checker - Online Test Against Rules

Define minimum length, uppercase, digits, special chars, and check if a password meets your custom policy. Instant feedback.

Security checker compliance password policy rules

31

URL Shortener Decoder - Online Expand Shortened Links

Find out the real destination of any shortened link (bit.ly, t.co, etc.) without clicking. Resolves redirects locally using public HTTP headers.

Network decode expand shortener URL

30

HTML Escape/Unescape - Online Encode Special Characters

Escape HTML special characters to prevent XSS attacks, or unescape HTML entities back to original text. Essential for web developers. Runs locally.

Developer Tools encode HTML escape unescape XSS

29

Memorable Passphrase Generator - Online XKCD Style

Create a strong yet easy‑to‑remember passphrase from random common words. Combines 4‑6 words. Fully offline. XKCD compliant.

Generator generator memorable passphrase words

29

Steganography Text Hider - Online Conceal Secret Message

Hide a secret message inside a normal text using zero-width characters or invisible ink. Copy the result. Decode with the same tool.

Security hide secret steganography zero-width

28

BIP39 Mnemonic Generator - Online 12/24 Words

Generate cryptographically secure BIP39 mnemonic phrases (12 or 24 words) for HD wallet seeds. All entropy generated locally.

Generator BIP39 mnemonic seed wallet

27

X‑Frame‑Options Tester - Online Clickjacking Defense

Check if a URL can be embedded in an iframe. Test your site’s defense against clickjacking. Browser‑based.

Security clickjacking security test X‑Frame‑Options

27

Local Password Breach Checker - Online k‑Anonymity

Tell if your password has appeared in data breaches without sending the full password. Uses hash prefix locally.

Security breach checker password safe

26

Random Crypto Key Generator - Online Create API Tokens & Secrets

Generate strong random strings for API tokens, session secrets, or encryption keys. Uses crypto.getRandomValues().

Generator crypto generator key token

26

Security Headers Auditor - Online Check HSTS, CSP & More

Enter a website and check which security headers (HSTS, CSP, X‑Frame‑Options) are present. Get a security grade.

Network audit CSP HSTS security headers

26

CSP Analyzer - Online Test & Improve Policy

Paste a Content‑Security‑Policy header and get a human‑readable breakdown. See potential risks and suggestions.

Analyzer analyzer CSP header security

26

DKIM Record Generator - Online Public Key DNS Entry

Generate a DKIM DNS record from a public key and selector. Check syntax. Improve your domain’s email deliverability.

Network authentication DKIM DNS email

25

Regex Injection / ReDoS Tester - Online Safe Pattern Test

Test a regular expression against malicious inputs to detect catastrophic backtracking and ReDoS vulnerabilities. Educational.

Developer Tools injection ReDoS regex security

25

JWT Signature Verifier - Online HMAC/RSA/EC Check

Paste a JWT and a public key or secret to verify the signature. Supports HS256, RS256, ES256. All operations local.

Security HS256 JWT signature verify

25

DNSSEC Chain Validator - Online Check RRSIG & DS

Validate a DNSSEC chain by entering DS and RRSIG records. Verify that signatures match. Educational. Local algorithm.

Network DNS DNSSEC security validator

25

HSTS Header Checker - Online Strict‑Transport‑Security

Fetch a site’s HSTS header and validate its syntax, max‑age, and subdomain flags. Ensure your site enforce HTTPS.

Network checker header HSTS security

25

Text to HTML Safe Converter - Online Escape for Web

Convert plain text into HTML‑safe strings by escaping <, >, &, and quotes. Insert into code safely. Local copy.

Developer Tools HTML escape safe text XSS

24

Encrypted Note Taker - Online Write & Encrypt in Browser

Write notes that are encrypted in your browser before saving to localStorage. Only accessible with your passphrase.

Productivity AES encrypted notes secure

24

Brute Force Time Estimator - Online Password Cracking Simulation

Enter a password and see the estimated time it would take to crack using brute force at different speeds. Educational.

Educational brute force crack password simulator

24

SQL Injection Simulator - Online Educational Sandbox

Test SQL injection inputs on a mock database and see the resulting query. Learn how to prevent SQLi. No real data.

Educational learn security simulator SQL injection

24

Permissions‑Policy Header Parser - Online Decode & Check

Paste the Permissions‑Policy header and get a human‑readable table of allowed/blocked browser features. Understand how your site is restricted.

Parser header parser Permissions‑Policy security