Free Unlimited (Beta) All tools are free with no limits during beta. Limits will be introduced later; early users will get benefits.

Developer Tools

Free online tools for developers. No sign-up required.

Browse by category or tag (hubs)

Most Used Tools

Utilities 9 views Email Header Spam DKIM SPF DMARC
Email Spam Score Checker

Analyze email headers and estimate deliverability / spam risk.

Open
Developer 10 views JWT Token Decoder JSON Security
JWT Decoder

Decode JWT header and payload as readable JSON (no verification).

Open
Utilities 9 views SEO Audit Meta Performance Technical
SEO Analyzer

Premium on-page & technical SEO audit for a URL (with optional mini-crawl).

Open
Developer 10 views Text Diff Compare Developer
Text Diff Checker

Compare two texts and highlight differences instantly.

Open
Developer 10 views URL Encode Decode Querystring
URL Encode/Decode

Encode or decode URLs safely for web requests.

Open
Developer 10 views UUID Generator Security
UUID Generator

Generate UUID v4 instantly.

Open

Other tools

Developer 5 views Base64 Encode Decode Converter
Base64 Encode/Decode

Encode or decode Base64 quickly.

Open
Developer 7 views Cron Scheduler Time
Cron Expression Generator

Generate cron expressions with visual interface.

Open
Utilities 6 views SEO Duplicate Content Similarity Articles
Duplicate Content Checker

Compare multiple articles and detect similarity/duplicate content.

Open
Developer 4 views Hash MD5 SHA256 Security Generator
Hash Generator

Generate MD5 and SHA hashes instantly.

Open
Developer 4 views IP Subnet Network
IP Subnet Calculator

Calculate network address, broadcast, and host range.

Open
Developer 8 views JSON Formatter Validation
JSON Formatter

Format and validate JSON.

Open
Developer 4 views JSON XML Converter
JSON to XML Converter

Convert JSON to XML format instantly.

Open
Developer 4 views JavaScript Beautify Formatter Developer
JavaScript Beautifier

Format JavaScript with readable indentation.

Open
Developer 4 views JavaScript Minify Compression Developer
JavaScript Minifier

Safely minify JavaScript by removing comments and extra whitespace.

Open
Utilities 5 views SEO Keywords Density Content
Keyword Density Analyzer

Analyze keyword frequency and density for any text.

Open
Utilities 5 views Password Generator Security Random
Password Generator

Generate secure random passwords with custom rules.

Open
Developer 4 views Regex Tester Pattern
Regex Tester

Test regular expressions with live matching.

Open
Utilities 4 views Robots SEO Crawl Validator Generator
Robots.txt Generator

Generate and validate robots.txt rules.

Open
Utilities 7 views Schema.org JSON-LD Structured Data SEO Validator
Schema.org Generator & Validator

Generate JSON-LD structured data and validate it.

Open
Utilities 6 views Sitemap SEO XML URL Generator Index
Sitemap Generator

Generate a valid sitemap.xml from a list of URLs.

Open
Utilities 6 views Timestamp Converter Date
Timestamp Converter

Convert between Unix timestamp and date.

Open
Developer 8 views UUID Generator Bulk
UUID Bulk Generator

Generate multiple UUIDs at once (1-500).

Open

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