free browser tools

93 free tools that run in your browser . no account , no tracking , no uploads .

DNS

Λασες - over - Λασες client

query Λασες records via cloudflare Λασες google doh

DNS

Λασες propagation checker

compare answers from three independent resolvers

DNS

subdomain generator

generate hundreds of potential subdomains

domain

whois viewer

look up domain registration details

domain

punycode converter

convert idns to / from punycode

mx record validator

check valid mail exchanger records

spf / dkim / dmarc parser

parse email authentication records

spf record builder

build spf records Λασες count Λασες lookups

dmarc record builder

generate dmarc policy Λασες reporting records

email header analyzer

trace delivery hops Λασες authentication results

disposable email identifier

check against known burner domains

email cleaner

bulk clean , validate , deduplicate emails

security

security . txt auditor

validate security . txt per rfc 9116

security

password Λασες checker

check passwords against hibp with k - anonymity

security

Λασες & security headers generator

build content - security - policy Λασες header sets

security

wordpress salt generator

generate wp - config keys Λασες salts

security

wordpress hardening generator

wp - config . php Λασες . htaccess snippets

security

Λασες permission calculator

convert octal modes Λασες rwx permissions

security

jwt decoder

decode jwt headers , claims Λασες expiry

security

hash generator

md5 , sha - 1 , sha - 256 Λασες sha - 512 digests

SEO

llm . txt compliance checker

validate ai scraper instructions

SEO

robots . txt rules parser

test Λασες access rules for any user - agent

SEO

sitemap xml visualizer

parse sitemaps , filter , search , export csv

SEO

meta tag analyzer

analyze title , meta , opengraph tags

SEO

serp preview generator

preview google search results desktop + mobile

SEO

social card preview

og card previews Λασες a 1200x630 image generator

SEO

schema markup generator

build Λασες validate json - ld structured data

SEO

robots . txt & Λασες . txt generator

generate robots , Λασες Λασες security files

network

cidr & subnet calculator

ipv4 Λασες ipv6 network ranges Λασες masks

network

Λασες status code explorer

interactive reference for 40 + status codes

network

client - side port scanner

detect open ports on localhost

network

browser network capabilities tester

online status , connection type , downlink estimate

in - browser image classifier

mobilenet v2 classification , no upload

client - side embeddings search

semantic search with transformers . js

browser - based llm runner

run distilgpt - 2 text generation locally

in - browser ocr

extract text from images with tesseract . js

background remover

remove photo backgrounds with on - device segmentation

image upscaler

enlarge images 2x Λασες 3x with sharpening

speech to text

transcribe audio locally with whisper tiny

utility

scope estimator

size your management needs in 30 seconds

utility

password generator

strong passwords , generated locally

utility

image converter & compressor

resize Λασες convert to webp , avif Λασες jpeg

utility

base64 , Λασες & html encoder

encode Λασες decode text locally

utility

crontab generator & explainer

build Λασες decode Λασες schedules

network

Ping & Latency Visualizer

Graph live latency and network stability in your browser.

network

Subnet & CIDR Calculator

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

network

HAR (HTTP Archive) Viewer

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

security

Client-Side Password Vault & Generator

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

security

SSL/TLS Certificate Decoder

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

SEO

Keyword Density & Content Analyzer

Count words, reading time and top keyword phrases.

SEO

Structured Data (Schema.org) Validator

Validate JSON-LD schema syntax locally.

SEO

Redirect / Regex Path Mapper

Test URL rewrite rules and regex mappings in real time.

utility

Log Parser & Anonymizer

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

utility

CSV to JSON/XML Converter

Parse CSV and export JSON, XML or SQL inserts.

utility

Base64 Image Encoder/Decoder

Convert images to Base64 data URIs and back.

WordPress

WordPress Security Hardening Auditor

Audit a wp-config.php for security settings.

WordPress

wordpress salt generator

Generate wp-config.php authentication keys and salts.

WordPress

WP REST API Explorer

Probe a WordPress site's public REST endpoints.

WordPress

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.

security

Content Security Policy (CSP) Builder

Build and evaluate a CSP header interactively.

security

CORS Preflight Simulation Sandbox

Simulate CORS preflight requests and headers.

utility

Local/Session Storage & Cookie Inspector

Inspect everything stored in your browser for this origin.

Performance

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.

utility

Unix Timestamp & Epoch Converter

Convert between Unix timestamps and human dates.

utility

UUID / ULID Bulk Generator

Generate thousands of UUIDs or ULIDs locally.

Accessibility

Color Contrast Auditor (WCAG)

Test WCAG 2.1 contrast ratios.

utility

Diff Checker & Text Merge

Compare two text blocks line by line.

utility

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

Convert numbers between bases.

utility

Cron Expression Explainer

Explain a crontab expression in plain English.

security

Web Crypto Key Pair Generator

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

security

Bcrypt / Argon2 Playground

Hash passwords with bcrypt or Argon2id via WebAssembly.

security

BIP39 Mnemonic Converter

Generate seed phrases and derive BTC/ETH keys offline.

security

Steganography Encoder / Decoder

Hide and extract text in PNG pixel data locally.

utility

Regex Visualizer & Match Tester

Highlight matches, capture groups, timings and substitutions.

utility

JSON Schema Generator & Validator

Infer JSON Schema from data and validate documents.

utility

SQL Formatter & Syntax Checker

Format SQL with keywords, indentation and balance checks.

utility

Markdown to Live HTML Converter

Render markdown with code, tables and task lists live.

security

JWT Signature Verifier

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

network

GraphQL Schema Introspector

Parse SDL, browse types and generate query skeletons.

network

DNS Propagation Emulator

Simulate resolver caches and TTL countdown over 24 hours.

network

HTTP Header Builder & Auditor

Build raw requests, parse responses, audit security headers.

network

WebRTC Signaling Playground

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

network

WebSocket Tester & Frame Logger

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

Performance

Core Web Vitals Predictor

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

Performance

Image Compression Previewer

Compare original vs compressed size and quality side by side.

Performance

CSS Selector Performance Analyzer

Rank CSS selectors by rendering cost and flag risky rules.

Performance

Font Payload Optimizer

Inspect glyph coverage and estimate subsetting savings.

DevOps

Dockerfile Generator & Validator

Generate stack Dockerfiles and audit anti-patterns.

DevOps

Nginx Configuration Builder

Build server blocks, proxy and rate-limit configs.

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