Developer & Code Tools
Essential utilities built for software developers and system administrators. Format JSON, decode JWTs, generate cryptographically secure hashes, and test regex patterns 100% client-side.
JSON Formatter & Inspector
Prettify, format, validate and minify JSON
JWT Decoder & Inspector
Decode header, payload & claims offline
Base64 Encoder / Decoder
Encode/decode text strings & file assets
URL Encoder / Decoder
Escape special URL query parameters safely
UUID / GUID Generator
Generate bulk v4 RFC 4122 random UUIDs
Hash & Checksum Generator
Calculate SHA-256, SHA-512 & SHA-1 hashes
CSV ↔ JSON Converter
Convert spreadsheets CSV to JSON records
URL Shortener & Link Studio
Create encrypted, zero-tracking, privacy-first short links & QR codes 100% client-side
Regex Tester
Live regular expression pattern match debugger
Regex Explainer
Deconstruct regular expression patterns into plain English breakdown offline
JSON ↔ YAML Converter
Bi-directional JSON to YAML & YAML to JSON conversion
JSON Diff Checker
Compare JSON objects side-by-side with diff highlights
Timestamp Converter
Convert Unix epoch timestamps to calendar dates
Cron Schedule Descriptor
Human-readable crontab expression explanations
XML ↔ JSON Converter
Transform XML payloads to JSON objects
SQL Formatter
Format, indent & uppercase SQL query clauses
CSS Formatter & Minifier
Beautify or minify CSS stylesheets offline
Color & Unit Converter
HEX, RGB, HSL & px/rem unit converter
JSON Minifier
Minify and compact JSON payload strings
HTTP Status Codes
Searchable 1xx-5xx HTTP status code reference lookup
Git Branch & Commit Generator
Format ticket names into git branch titles
Keycode Event Finder
Inspect JavaScript keyboard event key/code values
HTML Entity Coder
Encode/decode special HTML entity characters
YAML Formatter
Validate and format YAML configurations
Diceware Password Generator
Generate memorable word-based passphrases with WebCrypto
HMAC Generator
Compute HMAC-SHA256, HMAC-SHA512 & HMAC-SHA1 signatures
File Checksum Calculator
Calculate SHA-256 & SHA-512 hashes of uploaded files
MIME Type Lookup
Search file extensions and Content-Type headers
Recommended Automated Pipelines
API Payload Debugging Pipeline
Format raw API responses, inspect syntax errors, and compare differences against expected payloads.
Token & Credential Inspection
Safely decode token claims, verify expiration timestamps, and compute hashes with zero server leaks.
Tutorials & Technical Guides
Frequently Asked Questions
Are my API keys, tokens, or code snippets transmitted to remote servers?
No. All developer utilities, JSON formatting, JWT decoding, Base64 operations, and cryptographic hashing execute 100% locally inside your web browser thread. Data never leaves your device memory.
Which cryptographic hashing algorithms are supported?
Zeugly uses the native browser WebCrypto API to generate SHA-256, SHA-512, SHA-384, SHA-1, MD5, and HMAC signatures with hardware acceleration.
Can I format large JSON and SQL payloads without browser lag?
Yes. Our parsers execute in optimized memory chunks with real-time syntax validation to minimize memory overhead even on multi-megabyte payloads.