All free online tools

JSON Formatter

Format, minify and validate JSON for APIs and configuration files.

CSV to JSON

Convert data between CSV and JSON with custom delimiters.

YAML to JSON

Convert configuration files between YAML and JSON.

Cron Generator

Create cron expressions for jobs, scripts and recurring reports.

HTML Minifier

Compress HTML snippets, templates and page code.

HTML Entity Encoder

Encode and decode special characters for safe HTML snippets.

HTTP Status Codes

Look up 200, 301, 404, 500 and other HTTP responses.

MIME Type Lookup

Find content types for common file extensions.

CSS Minifier

Compress stylesheets, remove comments and estimate savings.

JWT Decoder

Inspect token header, payload, expiration and claims locally.

Regex Tester

Test regular expressions with flags, matches and capture groups.

URL Encoder

Encode and decode parameters, paths and strings for links and APIs.

SHA Hash Generator

Create SHA-256, SHA-384 and SHA-512 hashes locally from text.

Color Converter

Convert HEX colors to RGB and HSL with a live CSS preview.

Date Calculator

Add days, weeks or months and count days between dates.

Percentage Calculator

Calculate percentages, discounts, increases and percent change.

Unit Converter

Convert length, weight and temperature units instantly.

UTM Builder

Create tagged campaign URLs for analytics, ads and newsletters.

Robots.txt Generator

Create crawl rules and sitemap directives for SEO.

Robots.txt Validator

Find common robots.txt crawl issues before publishing.

XML Sitemap Generator

Build sitemap.xml files from URL lists with lastmod and priority.

Base64 Encoder

Encode and decode Base64 text for tests, APIs and tokens.

Base64 Converter

Convert Base64 through an alternate workflow for common technical uses.

Epoch Converter

Convert Unix timestamps to readable dates and back.

Text Cleaner

Normalize content pasted from PDFs, AI tools, documents and websites.

Text Diff Checker

Compare two text versions and find changed lines.

Email Validator

Check email address syntax for lists, forms and QA.

Slug Generator

Create clean SEO-friendly URL slugs from page titles.

Meta Title Checker

Check title length, pixel estimate and SERP truncation risk.

Meta Description Checker

Preview snippets and tune description length for SEO.

SERP Preview

Simulate a Google-style result with title, URL and description.

Open Graph Generator

Create social sharing meta tags and Twitter Cards.

Schema Markup Generator

Create JSON-LD structured data for common page types.

Keyword Density Checker

Analyze top terms and target keyword density.

Markdown to HTML

Convert Markdown drafts and README snippets to HTML.

Unicode Cleaner

Remove invisible characters that break prompts, forms or code.

Space Remover

Remove duplicate spaces and unnecessary line breaks.

Word Counter

Count words, characters, lines and paragraphs for SEO or editing.

Word Frequency Counter

Find repeated words, top terms and content patterns.

Line Sorter

Sort lists, remove duplicates and reorganize line-based content.

Case Converter

Convert text between uppercase, lowercase, camelCase and more.

Uppercase Text

Convert full text to uppercase instantly.

Lowercase Text

Convert full text to lowercase for content normalization.

Password Generator

Create secure passwords with configurable length and character sets.

UUID Generator

Generate one or many UUID v4 identifiers for APIs, databases and tests.

Random Number Generator

Create random numbers with range, quantity and decimal options.

Password Strength Checker

Estimate password entropy and detect weak patterns locally.

QR Generator

Create QR codes for links, text, contacts or campaigns.

Dummy Data

Generate fake users, UUIDs and Lorem Ipsum for prototypes.