Gratis browserværktøjer

MX-postvalidator

Tjek gyldige Mail Exchanger-poster

SPF/DKIM/DMARC-fortolker

Fortolk e-mailautentificeringsposter

SPF-postbygger

Byg SPF-poster og tæl DNS-opslag

DMARC-postbygger

Generér DMARC-politik og rapporteringsposter

Analyse af e-mailheadere

Spor leveringshop og autentificeringsresultater

Identifikation af engangs-e-mail

Tjek mod kendte midlertidige domæner

E-mail-rensning

Rens, validér og fjern dubletter i e-mails i bulk

security.txt-auditor

Validér security.txt i henhold til RFC 9116

Tjek af adgangskodelækager

Tjek adgangskoder mod HIBP med k-anonymitet

Generator for CSP og sikkerhedsheadere

Byg Content-Security-Policy og headersæt

WordPress-saltgenerator

Generér wp-config-nøgler og -salte

WordPress-hærdningsgenerator

wp-config.php- og .htaccess-uddrag

chmod-rettighedsberegner

Konvertér oktale tilstande og rwx-rettigheder

JWT-afkoder

Afkod JWT-headere, claims og udløb

Hash-generator

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

llm.txt-compliancekontrol

Validér instruktioner til AI-scrapere

Fortolker for robots.txt-regler

Test URL-adgangsregler for en given user-agent

Sitemap-XML-visualisering

Fortolk sitemaps, filtrér, søg, eksportér CSV

Meta-tag-analyse

Analysér titel, meta og OpenGraph-tags

SERP-forhåndsvisningsgenerator

Forhåndsvis Google-søgeresultater på desktop og mobil

Forhåndsvisning af sociale kort

Forhåndsvisning af OG-kort og en 1200x630-billedgenerator

Schema-markup-generator

Byg og validér JSON-LD-strukturerede data

robots.txt- og llms.txt-generator

Generér robots-, llms- og sikkerhedsfiler

CIDR- og subnetberegner

IPv4- og IPv6-netværksintervaller og -masker

Udforskning af HTTP-statuskoder

Interaktiv reference til 40+ statuskoder

Portscanner på klientsiden

Registrér åbne porte på localhost

Test af browserens netværksfunktioner

Onlinestatus, forbindelsestype, downlink-skøn

Billedklassificering i browseren

MobileNet v2-klassificering, ingen upload

Embeddings-søgning på klientsiden

Semantisk søgning med Transformers.js

LLM-kører i browseren

Kør DistilGPT-2-tekstgenerering lokalt

OCR i browseren

Udtræk tekst fra billeder med Tesseract.js

Baggrundsfjerner

Fjern baggrunde fra fotos med segmentering på enheden

Billedforstørrelse

Forstør billeder 2x eller 3x med skarphed

Tale til tekst

Transskribér lyd lokalt med Whisper tiny

Omfangsberegner

Skitsér dine administrationsbehov på 30 sekunder

Adgangskodegenerator

Stærke adgangskoder, genereret lokalt

Billedkonvertering og -komprimering

Tilpas størrelse, og konvertér til WebP, AVIF eller JPEG

Base64-, URL- og HTML-kodning

Kod og afkod tekst lokalt

Crontab-generator og -forklaring

Byg og afkod cron-tidsplaner

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-saltgenerator

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.