All Online Tools

JSON Formatter

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

UUID Generator

Generate UUID v4 values locally in your browser.

JWT Decoder

Decode JWT Header and Payload locally. Signature verification is not performed.

Regex Tester

Test a JavaScript regular expression against text and inspect matches.

JSON Diff

Compare two JSON values and list field-level differences.

JSON to TS

Infer a TypeScript interface draft from a JSON sample.

UUID v3/v5

Generate deterministic UUID v3 or v5 values from namespace and name.

UA Parser

Identify common browser and OS information from User-Agent text.

HTTP Status

Search common HTTP status codes by code, name, or category.

HTTP Request

Send GET, POST, PUT, DELETE requests from your browser. View response status, headers, and body. Export as cURL.

Shader Lab

Edit GLSL fragment shaders in the browser with a live WebGL preview and built-in animation presets.

Security

File MD5

Drop or choose a local file to calculate its MD5 checksum.

Text Hash

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes for text.

Password

Generate random passwords locally with crypto.getRandomValues.

HMAC

Generate HMAC signatures with Web Crypto.

PEM Viewer

Identify PEM block type and size locally.

SecurityFile

File SHA

Calculate SHA-1, SHA-256, or SHA-512 hashes for local files in your browser.

Encoding

Base64 Converter

Encode and decode UTF-8 text with Base64 locally.

URL Encoder

Encode or decode URLs and query parameter values with encodeURIComponent.

QR Code

Generate QR code images from text or URLs locally in your browser.

HTML Entities

Convert between plain text and common HTML entities.

Unicode Converter

Convert Unicode escapes and normal text for multilingual strings.

Base Converter

Convert numbers between bases 2-36, including binary, octal, decimal, and hexadecimal.

JWT Encode

Generate a JWT Token from Header, Payload, and Secret locally in your browser.

Color

ColorText

Color Converter

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

ColorText

Gradient

Pick two colors and a direction to generate CSS gradient code with a live preview.

ColorText

Contrast

Calculate the WCAG contrast ratio between two colors and check AA or AAA compliance.

Date & Time

Timestamp

Convert Unix timestamps to local time and back, supporting seconds and milliseconds.

Cron Explainer

Break down common five-field cron expressions.

Date Interval

Calculate the number of days, hours, minutes, and business days between two dates.

Countdown

Enter a target date and time to see the remaining days, hours, minutes, and seconds.

Text

Text Counter

Count characters, words, lines, paragraphs, and UTF-8 bytes.

Case Converter

Convert text between camelCase, PascalCase, kebab-case, snake_case, and CONSTANT_CASE.

Markdown Preview

Preview common Markdown syntax as HTML locally in the browser.

Deduplicate Text

Remove duplicate lines while preserving the first occurrence.

Text Sort

Sort lines in ascending or descending order and remove empty lines.

Text Diff

Compare two text blocks line by line and show additions and removals.

Lorem Generator

Generate placeholder paragraphs for layouts and prototypes.

String Reverse

Reverse text by character or by line.

ROT13

Encode and decode text with ROT13, a quick reversible text transform.

Whitespace

Convert between spaces and tabs in text indentation with a customizable tab width.

Text Extract

Automatically extract URLs, emails, phone numbers, and IP addresses from mixed text.

Image

Image Compress

Reduce image file size by exporting with adjustable quality.

Image Format

Convert images locally between PNG, JPEG, and WebP.

Image Crop

Crop images locally by entering a crop rectangle.

Image Base64

Convert a local image to a copyable Data URL.

Favicon

Generate a 64×64 PNG favicon from a source image.

Image ASCII

Convert an uploaded image to ASCII art with adjustable character density and width.