All tools

Age Calculator

Calculate age in years, months, days, and total days between two dates.

Aspect Ratio Calculator

Calculate, simplify, and resize dimensions while preserving an aspect ratio.

Barcode Generator

Generate CODE128, EAN-13, or UPC-A barcodes locally with SVG and PNG downloads.

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 safely with UTF-8 support.

Base64 → Image

Decode supported image Base64 data locally and preview or download the result.

Canonical URL Generator

Normalize an absolute page URL and generate its canonical link tag.

Case Converter

Convert text to lowercase, title case, camelCase, snake_case, and more.

Character Counter

Count characters, letters, digits, spaces, words, and lines instantly.

Color Contrast Checker

Check HEX color contrast against WCAG AA and AAA requirements.

Color Palette Generator

Generate focused analogous, complementary, triadic, or monochromatic color palettes.

Cron Expression Parser

Explain a standard five-field cron expression and show its next runs.

CSS Border Radius Generator

Generate a CSS border-radius with shared or individual corner values.

CSS Box Shadow Generator

Create a focused CSS box-shadow with live preview and copyable output.

CSS Formatter

Beautify CSS into readable, consistently indented stylesheets.

CSS Minifier

Minify CSS safely and compare the original and compressed sizes.

CSS Unit Converter

Convert CSS px, rem, and em values with explicit font-size contexts.

CSV Cleaner

Apply selected safe cleanup operations to CSV data locally.

CSV ↔ TSV Converter

Convert quoted CSV and TSV data locally with proper delimiter escaping.

CSV Viewer

Parse CSV locally into a readable, safely truncated table preview.

Data Transfer Calculator

Calculate data size, transfer speed, or time with explicit bits and bytes.

Date Difference Calculator

Calculate the exact difference between two calendar dates in days, weeks, and months.

DNS Lookup

Query common DNS record types for a public hostname from our server.

Domain Extractor

Extract hostnames from text, URLs, and domain lists directly in your browser.

EXIF Viewer

Inspect available camera, exposure, GPS, and other image metadata locally.

Favicon Generator

Create common PNG favicon sizes locally from one source image.

File Size Converter

Convert file sizes between decimal and binary byte units explicitly.

Find & Replace

Find text or a regular expression and replace the first match or every match locally.

Gradient Generator

Create a linear CSS gradient with editable color stops and direction.

Hash Generator

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser.

HEX ↔ RGB Converter

Convert colors between HEX and RGB values with live validation and preview.

HMAC Generator

Generate HMAC-SHA-256, HMAC-SHA-384, or HMAC-SHA-512 signatures locally.

HSL ↔ RGB Converter

Convert HSL colors to RGB and back with a live color preview.

HTML Entity Encoder / Decoder

Encode or decode common HTML entities and Unicode safely in your browser.

HTML Formatter

Beautify and indent HTML as text without rendering or executing it.

HTTP Header Checker

View useful response headers from a public HTTP or HTTPS URL.

HTTP Status Checker

Check the HTTP status, response time, and redirects for a public URL.

Image Compressor

Compress JPEG, PNG, and WebP images locally in your browser.

Image Cropper

Crop images locally with freeform and common aspect-ratio presets.

Image Format Converter

Convert JPEG, PNG, and WebP images locally with browser-supported output formats.

Image Resizer

Resize JPEG, PNG, and WebP images locally while preserving their proportions.

Image → Base64

Convert an image to raw Base64 or a Data URL entirely in your browser.

IP Lookup

Resolve a hostname or inspect an explicit IP address with reverse DNS and classification.

JavaScript Formatter

Format JavaScript into readable code without executing it.

JavaScript Minifier

Minify JavaScript locally and compare the resulting file size.

JSON ↔ CSV Converter

Convert flat JSON records to CSV or CSV rows to formatted JSON.

JSON Formatter

Format, validate, and minify JSON instantly in your browser.

JSON Minifier

Minify valid JSON and see how many characters and bytes you save.

JSON Tree Viewer

Inspect JSON as an expandable typed tree with practical depth and node limits.

JSON Validator

Validate JSON and locate syntax errors without changing your input.

JSON ↔ YAML Converter

Convert JSON to readable YAML or YAML to formatted JSON locally.

JWT Decoder

Decode JWT headers and payloads locally without verifying signatures.

List Randomizer

Shuffle a line-separated list fairly while preserving duplicates by default.

Lorem Ipsum Generator

Generate placeholder lorem ipsum text by paragraphs, sentences, or words.

Markdown Preview

Preview common Markdown locally with safe, non-executable rendering.

Meta Tag Generator

Generate focused HTML title, description, robots, canonical, and author tags.

Number Base Converter

Convert integers between binary, octal, decimal, and hexadecimal.

Open Graph Generator

Generate focused Open Graph meta tags for a page or social share card.

Open Graph Preview

Preview an approximate social share card using local title and description fields.

Password Generator

Generate strong random passwords locally in your browser.

PDF Metadata Viewer

Inspect available PDF document metadata and page count entirely in your browser.

PDF Page Counter

Count pages in a PDF locally without uploading or rendering the document.

Percentage Calculator

Calculate percentages, proportions, and percentage changes instantly.

Percentage Change Calculator

Calculate percentage increase or decrease and the absolute difference.

Placeholder Image Generator

Generate simple placeholder PNG or WebP images with custom dimensions and colors.

QR Code Generator

Generate downloadable QR codes from text or URLs in your browser.

Random Number Generator

Generate secure random integers or decimals within a custom range.

Random Picker

Pick one or more unique winners from a list using secure browser randomness.

Random String Generator

Generate configurable cryptographically random strings locally.

Ratio Calculator

Simplify a general ratio, compare its decimal value, and scale it to a target.

Redirect Checker

Inspect the redirect chain and final destination of a public HTTP URL.

Regex Tester

Test regular expressions, flags, matches, and capture groups instantly.

Remove Duplicate Lines

Remove repeated lines while preserving the first occurrence and original order.

Remove Empty Lines

Remove empty or whitespace-only lines while preserving the remaining text order.

Robots.txt Generator

Generate understandable robots.txt groups with allow, disallow, and sitemap rules.

Robots.txt Tester

Fetch and evaluate a robots.txt rule for a selected user-agent and path.

Rule of Three Calculator

Solve the simple proportional relationship A : B = C : X.

Schema Markup Generator

Create valid WebSite, Organization, Person, breadcrumb, or FAQ JSON-LD.

Screen PPI Calculator

Calculate screen pixel density, total pixels, and pixel pitch from resolution and size.

Sitemap Viewer

View entries and last modification dates from a public XML sitemap or sitemap index.

Slug Generator

Create clean URL-friendly slugs with hyphen or underscore separators.

Sort Lines

Sort multiline text alphabetically or numerically in ascending or descending order.

SQL Formatter

Format SQL queries into readable, consistently indented text.

SSL Certificate Checker

Inspect the TLS certificate, validity dates, issuer, and protocol for a public hostname.

SVG Optimizer

Optimize SVG markup locally with safe preview, size comparison, and download.

SVG Viewer

Preview SVG markup safely and inspect its basic dimensions locally.

Text Diff

Compare two text or code snippets and highlight their differences.

Text Reverser

Reverse characters, words, or line order in text with Unicode-aware character handling.

Time Duration Calculator

Calculate hours, minutes, and seconds between two times, including overnight spans.

Time Zone Converter

Convert a date and time between IANA time zones with daylight-saving support.

Unix Timestamp Converter

Convert Unix timestamps and dates between local time and UTC.

URL Encoder / Decoder

Encode or decode URL components safely, including UTF-8 text.

URL List Cleaner

Clean and normalize URL lists locally while preserving useful query parameters.

URL Parser

Parse a URL into its protocol, host, path, query, and fragment.

UTM Builder

Build trackable campaign URLs with UTM parameters while preserving existing queries.

UUID Generator

Generate one or more cryptographically secure UUID v4 values.

Word Counter

Count words, characters, lines, paragraphs, and reading time instantly.

XML Formatter

Validate XML and format it into readable, indented text.

XML ↔ JSON Converter

Convert XML and JSON locally with explicit mapping for attributes and repeated elements.

XML Validator

Check XML syntax and well-formedness locally in your browser.