Tool directory
All tools
Browse every SolveKit utility. Each tool solves one real problem quickly, clearly, and without requiring an account.
HTML Entity Encoder
Escape reserved HTML characters to safe entities.
DeveloperHTML Entity Decoder
Decode HTML entities back to their original characters.
DeveloperUUID Generator
Generate secure RFC 4122 version 4 UUIDs in bulk.
DeveloperUUID Validator
Validate UUID format and identify its version.
DeveloperHash Generator
Create SHA-1, SHA-256, SHA-384, or SHA-512 hashes locally.
DeveloperJWT Decoder
Decode JWT headers and payloads without transmitting the token.
DeveloperCron Expression Explainer
Translate standard five-field cron expressions into plain English.
DeveloperColor Converter
Convert HEX, RGB, and HSL colors with an accessible visual preview.
DeveloperCSS Minifier
Remove comments and unnecessary whitespace from CSS.
DeveloperJavaScript Minifier
Apply safe whitespace and comment reduction to simple JavaScript.
DeveloperSQL Formatter
Format common SQL statements and clauses for readability.
DeveloperYAML to JSON Converter
Convert YAML to JSON or JSON to YAML locally.
DeveloperHTTP Status Code Lookup
Look up the meaning and class of common HTTP response codes.
DeveloperPassword Generator
Generate strong, customizable passwords using secure browser randomness.
SecurityPassword Strength Checker
Estimate password strength, entropy, and practical improvement steps.
SecurityEmail Validator
Check whether an email address has a valid practical format.
SecurityIP Address Validator
Validate IPv4 and IPv6 addresses and identify the version.
SecurityDomain Validator
Validate domain syntax, labels, length, and top-level domain shape.
SecurityCard Number Validator
Run a local Luhn checksum and identify common card network patterns.
SecurityUsername Generator
Generate memorable usernames from words, styles, and secure randomness.
SecurityPIN Generator
Generate secure numeric PINs of a chosen length.
SecurityImage Compressor
Compress JPEG, PNG, or WebP images locally with adjustable quality.
Image & DataImage Converter
Convert images between JPEG, PNG, and WebP in your browser.
Image & DataImage Resizer
Resize an image to exact dimensions while preserving aspect ratio.
Image & Data