Developer Tools
JSON formatter, Base64, UUID, JWT decode and other daily coding utilities.
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JSON Formatter & Validator
Pretty-print, minify and validate JSON with clear error messages.
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JSON to CSV Converter
Convert JSON arrays to CSV online. Free developer data converter.
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UUID Generator
Generate RFC 4122 version 4 UUIDs for database records and APIs.
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CSV to JSON Converter
Convert CSV text to JSON array online. Instant free converter.
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Base64 Encode Decode
Encode plain text to Base64 or decode Base64 back to readable text.
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HTML Encoder
Encode special characters to HTML entities.
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HTML Minifier
Minify HTML online to remove whitespace and comments for faster page loads.
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JWT Payload Decoder
Decode JWT header and payload (Base64URL) without verifying signature.
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Markdown to HTML Converter
Convert basic Markdown headings, lists and links to HTML snippets.
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Regex Pattern Tester
Test regular expressions and count matches in sample text.
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Roman Numeral Converter
Convert Arabic numbers to Roman numerals and back.
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SHA512 Hash Generator
Generate SHA512 hash of text online free.
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Text Diff Checker
Compare two text blocks line-by-line and highlight differences.
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Binary Text Translator
Encode text to binary or decode binary back to readable text.
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Cron Expression Explainer
Translate cron schedules like 0 9 * * 1-5 into plain English.
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CSS Minifier
Minify CSS online — shrink stylesheets for better PageSpeed and Core Web Vitals.
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HTML Decoder
Decode HTML entities back to text.
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HTML Entity Encoder
Convert special characters to HTML entities for safe web output.
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JavaScript Minifier
Minify JavaScript online to reduce file size for faster websites.
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SHA-256 Hash Generator
Generate SHA-256 hash digest from any input string.
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SHA1 Hash Generator
Generate SHA1 hash of text online free.
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SQL Formatter
Beautify SQL queries with indentation for readability.
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Unix Timestamp Converter
Convert Unix epoch seconds to human-readable date and time.
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URL Decoder
Decode percent-encoded URL strings.
Tools FAQ
Are Developer tools free on QuizDaily?
Yes. Every tool in this category is free to use with no signup required.
Do these tools work on mobile?
Yes. All QuizDaily tools are mobile-friendly for Android and iPhone.
Is my data private?
Image tools process files in your browser. Calculator inputs stay in your session and are not stored as personal profiles.