🛠️ 79 Free Tools · No Signup · No Limits
Free Email & Developer Tools
Professional-grade tools for email security, DMARC/DKIM/SPF analysis, domain health checks, and developer utilities. All free, all instant.
79 free tools
0 signup required
∞ uses per day
All 79 tools across 8 categories
Content Tools
9 toolsFree online content tools for everyday text and media tasks. Generate QR codes, scan barcodes, convert text case, count words, compare document differences, and create random strings. No account required, no data stored.
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QR Code Generator
Generate QR codes for URLs, text, or contact cards: download as PNG or SVG.
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NewQR Code Scanner
Scan and decode QR codes directly from your camera or by uploading an image file.
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Text Case Converter
Convert text between UPPER, lower, Title, camelCase, snake_case, and more.
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Text Diff Checker
Compare two text blocks and highlight additions, deletions, and changes side by side.
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Word Counter
Count words, characters, sentences, and paragraphs: with reading time estimate.
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Random String Generator
Generate random strings with custom length, charset, and format options.
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NewLorem Ipsum Generator
Generate placeholder text by paragraphs, sentences, or words. Start with classic Lorem ipsum. Copy or download.
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NewMarkdown Editor
Write Markdown with live HTML preview. Supports headings, code blocks, lists, links. Split/preview/source modes.
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NewColor Picker
Pick any color and get HEX, RGB, HSL values instantly. Tint/shade palette, contrast detection, copy any format.
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Email Authentication & Deliverability
17 toolsProfessional email authentication tools to configure and verify DMARC, DKIM, and SPF records for your domain. Improve email deliverability, fix inbox placement issues, test spam scores, check email blacklists, and analyze email headers. Everything senders need to pass authentication checks and stay out of the spam folder.
DKIM Analyzer
Fetch and deep-analyze DKIM records: key type, bit strength, test mode, revocation.
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DMARC Analyzer
Decode every DMARC tag, grade policy maturity, extract report URIs and alignment.
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DMARC Checker
Instantly verify any domain's DMARC policy, enforcement level, and report config.
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DMARC Record Generator
Build a valid DMARC TXT record with a visual form: live preview and strength score.
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GuidedDMARC Wizard
5-step guided DMARC setup: checks existing record, walks through every decision.
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Email Blacklist Checker
Check any domain or IP against 23 major spam blacklists via real DNSBL lookups.
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Email Header Analyzer
Parse and analyze email headers: delivery hops, SPF/DKIM/DMARC auth, spam score.
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PopularEmail Health Checker
5-point health check: MX, SPF, DMARC, DKIM, disposable detection: graded A-F.
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ESP Finder
Identify which email service provider a domain uses for sending and receiving email.
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IP Blacklist Checker
Check any IP address against major spam and abuse blacklists instantly.
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Inbox Placement Test
Test whether your email lands in inbox, spam, or promotions across major providers.
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SMTP Delivery Tester
Test email deliverability by sending a real SMTP test and checking the result.
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Spam Score Tester
Analyze email subject and body for 80+ spam trigger words with weighted scoring.
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SPF Flattening Tool
Resolve all SPF include chains to explicit IPs and eliminate the 10-lookup limit.
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NewSPF Record Checker
Fetch and validate any domain's SPF record: inspect all mechanisms, count DNS lookups, detect include chains, and flag misconfigurations.
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NewBIMI Record Checker
Look up any domain's BIMI record: verify logo URL, VMC authority evidence, and selector. Check BIMI requirements for brand logo display in Gmail and Apple Mail.
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NewMX Priority Optimizer
Analyze MX record priorities, redundancy, and TTL. Detect delivery risks and get fix recommendations.
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Email Discovery & Validation
7 toolsEmail validation and discovery tools to verify email addresses, detect disposable inboxes, identify free providers, extract emails from text, and find professional contact addresses by domain. Essential for list hygiene, lead generation, and reducing bounce rates.
Email Extractor
Extract all email addresses from any block of text, HTML, or pasted content.
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Email Finder
Find professional email addresses by domain: discover contact emails for outreach.
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Email Name Extractor
Extract the name portion from an email address or a list of email addresses.
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PopularEmail Validator
Validate email address syntax, domain existence, MX records, and disposable status.
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Free Email Checker
Detect whether an email address belongs to a free provider like Gmail or Yahoo.
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NewCatch-All Email Detector
Check if a domain accepts all email addresses regardless of whether they exist. Essential for list cleaning and protecting sender reputation.
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NewEmail List Cleaner
Paste a bulk email list to validate syntax, detect disposable providers, flag role-based addresses, remove duplicates, and export a clean list. 100% client-side.
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Privacy & Security
6 toolsOnline privacy and security tools to protect your accounts and personal data. Check if your email or password appeared in a known data breach, generate strong secure passwords, audit your domain for email privacy risks, and detect disposable email usage. Built privacy-first. No data stored or logged.
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Email Breach Checker
Check if an email was exposed in a data breach across multiple security databases.
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NewPassword Breach Checker
Check if a password has appeared in known data breaches using k-anonymity: private.
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PopularPassword Generator
Generate strong, secure passwords with custom length and character set options.
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Password Strength Checker
Analyze password strength: entropy, crack time estimate, and improvement tips.
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Disposable Domain Checker
Bulk-check up to 50 domains against disposable email provider databases.
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Email Privacy Auditor
Full privacy scan: SPF, DMARC, DKIM, MX, BIMI, and risk scoring for any domain.
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Web Security
6 toolsFree web security tools for developers, sysadmins, and security researchers. Check SSL/TLS certificates, scan HTTP security headers, verify HSTS configuration, inspect all response headers, trace redirect chains, and parse User Agent strings. Every tool shows actionable fix recommendations alongside each result.
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SSL Certificate Checker
Scan any domain's SSL/TLS certificate: expiry, grade (A+ to F), TLS protocols, HSTS, and vulnerabilities. Powered by SSL Labs.
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NewSecurity Headers Scanner
Scan any website's HTTP security headers: CSP, HSTS, X-Frame-Options, and more. Graded A+ to F with fix recommendations.
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NewHSTS Checker
Verify any domain's HTTP Strict Transport Security header: max-age, includeSubDomains, preload, and preload list status.
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NewHTTP Headers Checker
View all HTTP response headers for any URL: colour-coded by category with a built-in security audit for missing headers.
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NewRedirect Checker
Trace the full redirect chain for any URL: every hop, status code (301/302/307/308), and SEO impact analysis.
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NewUser Agent Parser
Parse any User Agent string: detect browser, version, OS, device type, rendering engine, and CPU architecture instantly.
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SEO Tools
5 toolsFree SEO tools for content creators and web developers. Analyze meta tags and Open Graph previews, generate robots.txt files, check keyword density, build UTM tracking URLs, and preview how your pages look when shared on social media.
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Meta Tag Analyzer
Check any URL's title, meta description, Open Graph, Twitter Card, canonical, and robots tags. SEO score.
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NewOpen Graph Preview
See how any URL looks when shared on Facebook, LinkedIn, Twitter, and Slack. Live OG tag checker.
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NewRobots.txt Generator
Create a robots.txt file with custom user-agent rules. Presets for AI bot blocking, WordPress, e-commerce.
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NewKeyword Density Checker
Analyze keyword frequency and density in any text. Stop words filtered. Top 50 keywords ranked by count.
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NewUTM Builder
Generate UTM-tagged URLs for Google Analytics. All 5 parameters with channel presets for ads, email, social.
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Network & DNS
10 toolsFree network and DNS lookup tools for sysadmins, developers, and security researchers. Query live DNS records (A, MX, TXT, CNAME, NS, AAAA), look up IP geolocation and ISP data, and convert between CIDR notation and IP address ranges instantly in your browser.
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DNS Lookup Tool
Query any DNS record type: A, MX, TXT, CNAME, NS, AAAA: via live DNS over HTTPS.
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NewIP Address Lookup
Look up geolocation, ISP, timezone, and network info for any IP address instantly.
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CIDR to IP Range
Convert CIDR notation to a full range of IP addresses with first, last, and count.
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IP Range to CIDR
Convert an IP range (start-end) back to CIDR notation blocks.
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NewDNS Propagation Checker
Test DNS propagation across Cloudflare, Google, OpenDNS, and Quad9. Check A, MX, TXT, CNAME records across 6 resolvers.
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NewWHOIS Lookup
Search domain registration details: registrar, expiry dates, name servers, DNSSEC status. Powered by RDAP.
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NewSubdomain Finder
Scan any domain for 60+ common subdomains via live DNS: www, mail, api, admin, dev, staging, and more.
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NewWebsite Uptime Checker
Check if any website is up or down and measure server response time. HTTP status code. Server-side check.
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NewMX Record Lookup
Instantly query any domain's mail exchange records: see all MX servers sorted by priority and identify the email provider. Powered by Cloudflare and Google DNS.
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NewReverse DNS Lookup
Perform a reverse DNS lookup on any IPv4 address: resolve the PTR record and hostname. Essential for verifying mail server identities and diagnosing deliverability.
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Developer Utilities
19 toolsFree developer tools for everyday coding tasks. Format and validate JSON, encode and decode Base64 or URLs, generate UUIDs and cryptographic hashes, minify CSS and JavaScript, convert HTML to Markdown, and transform Unix timestamps. All tools run client-side in your browser with no data sent to any server.
Base64 Encoder / Decoder
Encode or decode Base64 strings instantly in your browser: no data sent.
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CSS Minifier
Minify CSS files to reduce file size: removes whitespace, comments, and redundancy.
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JS Minifier
Minify JavaScript code to reduce file size while preserving functionality.
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HTML Formatter
Format and prettify HTML markup with configurable indentation and validation.
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HTML to Markdown
Convert HTML content to clean Markdown with support for tables, lists, and code.
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PopularJSON Formatter
Format, validate, and beautify JSON: with syntax highlighting and error detection.
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Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any input text.
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URL Encoder / Decoder
Percent-encode or decode URLs and query strings instantly in your browser.
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UUID Generator
Generate RFC 4122 UUIDs (v1, v4): bulk generation and multiple formats supported.
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Timestamp Converter
Convert Unix timestamps to human-readable dates and times: and vice versa.
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NewJWT Decoder & Validator
Decode any JWT instantly: inspect header, payload, claims, expiry, algorithm, and security issues. 100% client-side.
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NewRegex Tester
Test and debug JavaScript regex with live match highlighting, capture groups, all flags, replace mode, and 10 preset patterns.
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NewCron Expression Generator
Build cron expressions visually or paste any cron string to get a plain English explanation with next 5 run times.
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NewXML Formatter
Beautify, minify, and validate XML. Formats with proper indentation, detects parse errors with exact messages. 100% client-side.
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NewJSON to CSV Converter
Convert any JSON array of objects to CSV or TSV instantly. Handles missing fields, nested values, and 3 delimiter options.
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NewJSON to YAML Converter
Convert JSON to YAML for Kubernetes, Docker Compose, GitHub Actions, and Ansible configs. All data types handled.
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NewURL Parser
Break any URL into protocol, hostname, port, path, query params, and fragment. Decodes URL-encoded chars automatically.
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NewSlug Generator
Convert any title to a clean SEO-friendly URL slug. Hyphen/underscore, accents, bulk mode, and max-length options.
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NewSQL Formatter
Beautify or minify any SQL query. Format SELECT, JOIN, WHERE, GROUP BY with proper indentation. MySQL, PostgreSQL, SQLite.
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Need a disposable email address?
Generate a free, instant temp mail. Zero signup, works in seconds. Used by 2M+ people.