All Tools & Resources
Browse every free tool, developer guide, and quick-conversion page on ToolZip. All tools run in your browser — no sign-up, no data uploaded.
Text Tools
Free online text manipulation tools. Count words, convert case, generate lorem ipsum, compare text, encode strings, and more.
Word & Character Counter
Count words, characters, sentences & paragraphs with readability score
Case Converter
Convert text between camelCase, snake_case, kebab-case & 10+ formats
Lorem Ipsum Generator
Generate placeholder text — paragraphs, sentences, or words
Text Diff Checker
Compare two texts & highlight differences side by side
String Encoder / Decoder
URL encode, HTML entity encode/decode & more in a pipeline
Markdown to HTML Converter
Convert Markdown to HTML with live preview — GFM supported
Markdown Viewer
View MD files online — read mode, TOC, PDF & HTML export
Text Repeater & Manipulator
Repeat, reverse, sort, deduplicate & manipulate text
HTML Entity Encoder / Decoder
Encode & decode HTML entities — named, numeric & hex formats
HTML to Markdown Converter
Convert HTML to Markdown — headings, tables, code blocks & more
URL Slug Generator
Generate clean URL slugs from titles — bulk mode & custom separators
Character Frequency Analyzer
Visualize character frequency — counts, percentages & Unicode codes
Line Sorter & Deduplicator
Sort, deduplicate, shuffle & filter lines with prefix/suffix options
Developer Tools
Essential developer utilities. Format JSON, test regex, generate UUIDs, encode Base64, decode JWTs, build cron expressions, and hash strings.
JSON Formatter & Validator
Format, validate & explore JSON with tree view & error highlighting
Regex Tester
Test regex patterns with live highlighting & plain-English explanations
UUID / ULID Generator
Generate UUID v4, v7 & ULID — bulk up to 1,000
Base64 Encoder / Decoder
Encode & decode Base64 — text, files & image preview
JWT Decoder
Decode JWTs — view header, payload & expiry status
Cron Expression Generator
Build cron expressions visually — see next 10 run times
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 & HMAC hashes
Password Generator
Generate secure passwords with custom length & character sets
QR Code Generator
Generate QR codes for URLs, text, Wi-Fi & more — download as PNG/SVG
JSON to CSV Converter
Convert JSON arrays to CSV with auto column detection & download
JSON to YAML Converter
Convert JSON to YAML and back — preserves types & nesting
SQL Formatter
Format & beautify SQL queries with proper indentation & keyword styling
Chmod Calculator
Calculate Unix file permissions — numeric & symbolic chmod notation
JSON to XML Converter
Convert JSON to XML and back — nested objects & arrays supported
CSV to JSON Converter
Convert CSV to JSON arrays with auto delimiter detection
JavaScript Formatter
Format, beautify & minify JavaScript with syntax highlighting
YAML Validator
Validate YAML syntax, find errors & convert to JSON
XML Formatter & Validator
Format, beautify & validate XML with error detection
IP Address Analyzer
Analyze IPv4 addresses with subnet calculator & binary/hex conversion
HTML Minifier
Minify HTML — remove comments, whitespace & optional tags
URL Parser & Decoder
Parse URLs into components — protocol, host, path, query params & hash
Backslash Escape / Unescape
Escape & unescape backslash sequences — \n, \t, \", \uXXXX
JSON Path Finder
Explore JSON interactively — click nodes to find & copy paths
Placeholder Image Generator
Generate placeholder images — custom size, color, text & download as PNG/SVG
Converters
Convert between formats instantly. Colors, number bases, timestamps, units, CSS values, and image formats — all in your browser.
Color Converter
Convert HEX, RGB, HSL, CMYK with contrast checker & palette generator
Number Base Converter
Convert binary, octal, decimal & hex with step-by-step math
Unix Timestamp Converter
Convert Unix timestamps to dates & vice versa with timezone support
Unit Converter
Convert length, weight, temperature & 12+ unit categories
CSS Unit Converter
Convert px to rem, em, vh, vw with visual size preview
Image Format Converter
Convert PNG, JPG, WebP & AVIF — 100% client-side, no upload
CSS Gradient Generator
Create linear, radial & conic CSS gradients with live preview
Text to Binary Converter
Convert text to/from binary, hex, octal & decimal
Developer Guides
In-depth articles on encoding, hashing, regex, formatting, and web development best practices.
How to Validate JSON: A Complete Guide
Validate JSON data, fix common syntax errors, and learn why validation matters for APIs and configs. Practical examples and free tools.
8 min read · JSON & DataRegex for Email Validation: The Right Way
The correct regex pattern for email validation, why simple patterns fail, and implementation in JavaScript, Python, and PHP.
9 min read · Regular ExpressionsChmod Permissions Explained: Linux Guide
Master Unix file permissions. Learn what 755, 644, and 777 mean, symbolic notation, and security best practices with an interactive calculator.
10 min read · Unix & LinuxBase64 Encoding Explained: How It Works
What Base64 encoding is, how the algorithm works, and when to use it. Covers data URIs, JWT tokens, and API authentication with code examples.
10 min read · Encoding & SecurityHow to Create a Strong Password: The Complete Security Guide (2026)
Learn what makes a password strong, the math behind password entropy, common mistakes hackers exploit, and how to create passwords that resist brute-force attacks. Includes NIST 2024 guidelines, passphrase strategies, and free tools.
12 min read · Encoding & SecurityMD5 vs SHA-256: Which Hash to Use?
Compare MD5 and SHA-256 side by side. Differences in security, speed, output size, and when to use each for checksums and passwords.
11 min read · Encoding & SecurityJSON vs YAML: When to Use Each Format
Compare JSON and YAML side by side. Key differences in syntax, features, and when each is better for configuration, APIs, and data exchange.
9 min read · JSON & DataUUID v4 vs v7 vs ULID: Which to Use?
Compare UUID v4, v7, ULID, and NanoID. Differences in randomness, sortability, size, and performance for databases and APIs.
10 min read · Developer ToolsCron Expression Syntax: Complete Guide
Master cron syntax with this guide. The 5-field format, special characters, common schedules, and examples for Linux, AWS, and Kubernetes.
12 min read · Unix & LinuxPX vs REM vs EM: CSS Unit Guide
Differences between px, rem, and em in CSS. When to use each for fonts, spacing, and responsive layouts with accessibility best practices.
8 min read · CSS & Web DevWebP vs AVIF vs PNG: Format Comparison
Compare WebP, AVIF, and PNG image formats. Compression ratios, quality, browser support, and when to use each for web performance.
9 min read · Web PerformanceRegex Cheat Sheet: 20 Essential Patterns
20 most useful regex patterns for email, URL, phone, date, IP, and password validation. Copy-paste ready with explanations.
11 min read · Regular ExpressionsWhat is JWT? Developer's Guide
How JSON Web Tokens work: three-part structure, common claims, security best practices, and when to use JWTs vs sessions.
10 min read · Encoding & SecurityURL Encoding Explained: When You Need It
What URL encoding is, which characters need it, %20 vs +, and how to encode in JavaScript, Python, and PHP. Practical examples.
8 min read · Encoding & SecurityHEX vs RGB vs HSL: Color Format Guide
Differences between HEX, RGB, and HSL. When to use each, conversion tips, and practical CSS color management advice.
9 min read · CSS & Web DevWCAG Color Contrast: Quick Guide
WCAG contrast ratio requirements for AA and AAA. How to check, fix, and design accessible color combinations for text and UI.
8 min read · CSS & Web DevUnix Timestamps Explained
What Unix timestamps are, why developers use epoch time, seconds vs milliseconds, timezone pitfalls, and the Year 2038 problem.
9 min read · Developer ToolsMarkdown Cheat Sheet: Syntax Reference
Complete Markdown syntax reference: headings, bold, italic, links, images, code blocks, tables, task lists, and GFM extensions.
10 min read · Text ProcessingcamelCase vs snake_case vs kebab-case Guide
When to use camelCase, snake_case, kebab-case, PascalCase, and CONSTANT_CASE. Conventions for JS, Python, CSS, SQL, and APIs.
8 min read · Text ProcessingHow to Create a Strong Password
What makes a password strong, how entropy works, why length beats complexity, and modern NIST best practices with examples.
9 min read · Encoding & SecurityHow to Generate QR Codes: Complete Guide
Create QR codes for URLs, Wi-Fi, email, phone, and text. Static vs dynamic, sizing, design tips, and scanning troubleshooting.
8 min read · Developer ToolsImage Optimization for the Web
Reduce image sizes by 60-80% without quality loss. Format selection, responsive images, lazy loading, and Core Web Vitals tips.
11 min read · Web PerformanceRegex for Phone Number Validation
Regex patterns for US, UK, international, and E.164 phone numbers. Formatting variations, country codes, and regex vs libraries.
9 min read · Regular ExpressionsCSS Gradients: Linear, Radial & Conic Guide
Master CSS gradients with examples. Linear, radial, conic syntax, color stops, repeating gradients, and creative design patterns.
10 min read · CSS & Web DevCommon JSON Errors and How to Fix Them
Fix the 10 most common JSON syntax errors: trailing commas, single quotes, unquoted keys, and unexpected tokens with examples.
8 min read · JSON & DataHow to Compare Two Text Files: 5 Methods
Compare texts to spot every difference. Online diff tools, command-line diff, VS Code, Git diff, and programmatic comparison.
8 min read · Text ProcessingVerify File Integrity with Hash Checksums
Use MD5, SHA-256, SHA-512 to verify downloads. Step-by-step instructions for Windows, Mac, and Linux with examples.
8 min read · Encoding & SecuritySQL Formatting Best Practices
SQL formatting standards for readable queries. Indentation, keyword casing, JOIN layout, subqueries, CTEs, and team style guides.
8 min read · Developer ToolsLorem Ipsum Guide for Designers
What Lorem Ipsum is, why designers use it, when NOT to, 8 creative alternatives, and how much text you need for any design.
7 min read · Text Processing28 Best Free Online Developer Tools
Curated list of free online developer tools: JSON formatters, regex testers, encoders, converters. Browser-based, private, no signup.
12 min read · Developer ToolsQuick Conversions
Dedicated pages for common conversions — each pre-configured and optimized for the specific conversion.