Free Browser Tools

security.txt Auditor

Validate security.txt per RFC 9116

Password Breach Checker

Aithint password le HIBP le k-anonymity

CSP & Security Headers Generator

Buile Policy sa Chontent-Security agus headéar set

WordPress Salt Generator

Generate wp-config keys and salts

WordPress Hardening Generator

wp-config.php and .htaccess snippets

chmod Permission Calculator

Convert octal modes and rwx permissions

JWT Decoder

Decode JWT headers, claims and expiry

Hash Generator

MD5, SHA-1, SHA-256 and SHA-512 digests

llm.txt Compliance Checker

Validate AI scraper instructions

robots.txt Rules Parser

Test URL access rules for any user-agent

Sitemap XML Visualizer

Parse sitemaps, filter, search, export CSV

Meta Tag Analyzer

Fisigh title, meta, tags OpenGraph

SERP Preview Generator

Preview Google search results desktop + mobile

Social Card Preview

OG card previews and a 1200x630 image generator

Schema Markup Generator

Buile agus aithint comhoibriú JSON-LD

robots.txt & llms.txt Generator

Generate robots, llms and security files

CIDR & Subnet Calculator

IPv4 and IPv6 network ranges and masks

HTTP Status Code Explorer

Interactive reference for 40+ status codes

Client-Side Port Scanner

Detect open ports on localhost

Brosóir Capcapail naettwork

Online status, connection type, downlink estimate

In-Browser Image Classifier

MobileNet v2 classification, no upload

Client-Side Embeddings Search

Semantic search with Transformers.js

Fut Runner LLM i bhFOPS

Run DistilGPT-2 text generation locally

In-Browser OCR

Extract text from images with Tesseract.js

Fhoirmean Stáidrimh

Remove photo backgrounds with on-device segmentation

Image Upscaler

Enlarge images 2x or 3x with sharpening

Speech to Text

Transcribe audio locally with Whisper tiny

Scope Estimator

Size your management needs in 30 seconds

Password Generator

Strong passwords, generated locally

Image Converter & Compressor

Resize and convert to WebP, AVIF or JPEG

Base64, URL & HTML Encoder

Encode and decode text locally

Crontab Generator & Explainer

Buile agus fhreastal cron schedules

Ping & Latency Visualizer

Graph live latency and network stability in your browser.

Subnet & CIDR Calculator

Compute network, broadcast, range and host count for any IPv4 CIDR.

HAR (HTTP Archive) Viewer

Parse .har files locally to inspect load times and payloads.

Client-Side Password Vault & Generator

Generate strong passwords and encrypt a credential list locally with a master password.

SSL/TLS Certificate Decoder

Decode a PEM certificate to inspect its size and SHA-256 fingerprint.

Keyword Density & Content Analyzer

Count words, reading time and top keyword phrases.

Structured Data (Schema.org) Validator

Validate JSON-LD schema syntax locally.

Redirect / Regex Path Mapper

Test URL rewrite rules and regex mappings in real time.

Log Parser & Anonymizer

Parse server logs, filter by level, anonymize IPs/emails.

CSV to JSON/XML Converter

Parse CSV and export JSON, XML or SQL inserts.

Base64 Image Encoder/Decoder

Convert images to Base64 data URIs and back.

WordPress Security Hardening Auditor

Audit a wp-config.php for security settings.

WordPress Salt Generator

Generate wp-config.php authentication keys and salts.

WP REST API Explorer

Probe a WordPress site's public REST endpoints.

WordPress Version & Theme Finder

Extract WordPress version, theme and plugins from pasted HTML.

Node.js

package.json Security Auditor

Audit a package.json for risky or outdated dependencies.

Node.js

.env Security Validator

Validate .env files for placeholder secrets and missing values.

Node.js

Express.js Route Mapper

Parse Express routing code into a visual endpoint map.

Content Security Policy (CSP) Builder

Build and evaluate a CSP header interactively.

CORS Preflight Simulation Sandbox

Simulate CORS preflight requests and headers.

Local/Session Storage & Cookie Inspector

Inspect everything stored in your browser for this origin.

Framework Bundle Budget Calculator

Estimate load times from bundle sizes across network speeds.

Frontend

Next.js Routing Matrix Parser

Visualize a Next.js app/pages folder tree as routes.

Unix Timestamp & Epoch Converter

Convert between Unix timestamps and human dates.

UUID / ULID Bulk Generator

Generate thousands of UUIDs or ULIDs locally.

Accessibility

Color Contrast Auditor (WCAG)

Test WCAG 2.1 contrast ratios.

Diff Checker & Text Merge

Compare two text blocks line by line.

Base Converter (Binary/Octal/Decimal/Hex/Base64)

Convert numbers between bases.

Cron Expression Explainer

Explain a crontab expression in plain English.

Web Crypto Key Pair Generator

Generate RSA or ECDSA key pairs and export JWK/PEM locally.

Bcrypt / Argon2 Playground

Hash passwords with bcrypt or Argon2id via WebAssembly.

BIP39 Mnemonic Converter

Generate seed phrases and derive BTC/ETH keys offline.

Steganography Encoder / Decoder

Hide and extract text in PNG pixel data locally.

Regex Visualizer & Match Tester

Highlight matches, capture groups, timings and substitutions.

JSON Schema Generator & Validator

Infer JSON Schema from data and validate documents.

SQL Formatter & Syntax Checker

Format SQL with keywords, indentation and balance checks.

Markdown to Live HTML Converter

Render markdown with code, tables and task lists live.

JWT Signature Verifier

Verify RS/PS/ES/HS JWT signatures with a public key locally.

GraphQL Schema Introspector

Parse SDL, browse types and generate query skeletons.

DNS Propagation Emulator

Simulate resolver caches and TTL countdown over 24 hours.

HTTP Header Builder & Auditor

Build raw requests, parse responses, audit security headers.

WebRTC Signaling Playground

Copy-paste SDP to open a direct data channel between tabs.

WebSocket Tester & Frame Logger

Connect to ws/wss endpoints, log frames and measure latency.

Core Web Vitals Predictor

Rate TTFB, LCP, CLS and INP against Google thresholds.

Image Compression Previewer

Compare original vs compressed size and quality side by side.

CSS Selector Performance Analyzer

Rank CSS selectors by rendering cost and flag risky rules.