ToolzyLabDeveloper tools for cleaner data and code
Use focused utilities for formatting data, comparing snippets, encoding values, checking tokens, cleaning text, and preparing code-related output.
Filter the tools on this page by task, format, or tool name.
Common workflows
Start with the task, then open the smallest tool that solves it.
Format
Beautify JSON, XML, HTML, CSS, JavaScript, and structured data for easier reading.
Inspect
Decode URLs, JWTs, Base64 strings, hashes, headers, and data formats before copying them.
Compare
Use diff, regex, and conversion helpers to understand changes and reduce mistakes.
Developer Tools directory
Practical tools are available in this section. Each card opens the working tool page.
Base64 Encoder / Decoder
Encode or decode Base64 from text or files instantly with ToolzyLab. Base64 encoder and decoder with drag and drop, file support, text preview, download, copy, auto detect, and...
Code Diff Viewer
Compare two code snippets or files side by side with color highlights, line-by-line differences, synced scrolling, ignore whitespace, ignore case, and browser-only processing.
Color Code Converter
Convert HEX, RGB, RGBA, HSL, HSLA, HSV, and CMYK color codes instantly with live preview, sliders, copy buttons, random color generator, contrast checker, and browser-only processing.
CSS Beautifier
Beautify, format, validate, minify and clean CSS or SCSS instantly with ToolzyLab. Browser-only CSS beautifier with smart detection, file upload, copy, search and download.
CSS Gradient Generator
Create professional linear and radial CSS gradients visually with ToolzyLab. Edit color stops live, adjust opacity and position, move radial center, use presets, randomize gradients, and...
Data URI Generator
Generate Base64 Data URIs from images, SVG, CSS, text, fonts and files instantly. Copy ready-to-use HTML, CSS and JavaScript snippets with a professional browser-only ToolzyLab tool.
Hash Generator
Generate MD5, SHA1, and SHA256 hashes instantly for any text input. Copy results, compare hashes, import text files, and use a professional browser-only hash generator by ToolzyLab.
HTML Beautifier
Beautify, format, clean, minify, validate and inspect messy HTML instantly with ToolzyLab. Browser-only HTML formatter with live preview, syntax highlighting, file upload and download.
HTML Entity Converter
Escape or unescape HTML entities instantly with ToolzyLab. Convert text to HTML-safe entities or decode entities back to readable text in your browser.
HTML Table Generator
Create clean HTML tables from JSON or CSV instantly with ToolzyLab. privacy-friendly, with smart detection, rendered preview, customizable classes, copy, and download.
HTTP Header Viewer
Deep analyze and compare HTTP response headers, security headers, redirects, SSL certificate, caching, cookies, CORS, robots.txt, security.txt, and export reports.
JavaScript Beautifier
Beautify, format, validate, minify and clean JavaScript or JSON instantly with ToolzyLab. Browser-only JavaScript beautifier with smart detection, syntax validation, file upload, copy...
JSON and CSV Converter
Convert JSON to CSV or CSV to JSON instantly with ToolzyLab. privacy-friendly, fast client-side conversion with auto detect, flatten nested objects, custom delimiter, pretty output, and...
JSON and YAML Converter
Convert JSON to YAML or YAML to JSON instantly with ToolzyLab. privacy-friendly, with smart format detection, pretty print, minify, sort keys, file upload, copy, download, and live...
JSON Diff Checker
Compare two JSON files or objects side by side with visual highlighting for added, removed, changed, and type-changed values. Validate, beautify, and export JSON diff reports instantly...
JSON Formatter
Format, validate, beautify, minify, inspect and download JSON instantly with ToolzyLab. Pretty-print JSON with live error highlighting, tree view, search, file upload and browser-only...
JWT Token Decoder
Decode, verify, compare, inspect, search, and generate JWT tokens carefully with ToolzyLab. Supports HS256 verification, RS256 public key verification, claim search, expiry countdown,...
Password Generator
Generate secure random passwords instantly with custom length, symbols, bulk generation, passphrase mode, pronounceable mode, strength checks, and copy tools - fully in your browser.
Regex Tester
Test, debug, and visualize regular expressions instantly with live match highlights, capture groups, replace preview, split results, regex flags, and browser-only processing.
Text Encrypt / Decrypt
Encrypt and decrypt plain text locally in your browser using AES-GCM with PBKDF2. secure, fast, and privacy-friendly.
URL Encoder / Decoder
Encode or decode any URL instantly with ToolzyLab. Browser-only URL encoder and decoder with file upload, safe parsing, query breakdown, copy, download, and clean side-by-side workspace.
UUID Generator
Generate random UUID v4 values for apps, databases, APIs, testing, and development workflows. Bulk UUID generation, formatting options, copy, download, and validation - fully in your...
XML Formatter
Beautify, indent, validate and minify XML or HTML instantly with ToolzyLab. Format messy markup in your browser with search, file upload, copy and download support.
Related guides
Use these practical guides to choose formats, settings, and safer workflows before you start.
JSON Formatter Guide: Fix Messy JSON and Find Errors Faster
A practical ToolzyLab guide to read, validate, and debug structured data without guessing. Learn what to check, which tools to use, and how to avoid common mistakes.
DeveloperJSON vs YAML vs CSV: Simple Differences for Real Projects
A practical ToolzyLab guide to choose the right data format for configuration, tables, and APIs. Learn what to check, which tools to use, and how to avoid common mistakes.
DeveloperBase64 Encoding Explained for Beginners
A practical ToolzyLab guide to understand what Base64 is useful for and what it does not secure. Learn what to check, which tools to use, and how to avoid common mistakes.
DeveloperURL Encoding: What It Is and When You Need It
A practical ToolzyLab guide to make links, query strings, and reserved characters safer to pass around. Learn what to check, which tools to use, and how to avoid common mistakes.
Developer Tools FAQ
Short answers for choosing and using these tools responsibly.
Do developer tools validate data?
Some tools validate or highlight errors, while others simply transform text. Check each tool page for the exact behavior before relying on output.
Is decoding the same as security verification?
No. Decoding Base64, URLs, or JWT payloads makes content readable; it does not prove that the content is trusted or verified.
Can formatting change my code?
Formatters should preserve meaning when possible, but always review output before pasting it into production code.