Quick, reliable tools for everyday tasks.
StackAtlas keeps essential encoding, diffing, and validation utilities in one focused workspace. Built for deep work sessions with calm visuals, predictable layouts, and keyboard-friendly navigation.
Latency
Sub-50ms
Instant client-side responses.
Organization
Structured
Categories map to workflows.
Access
No sign-in
Ready the moment you arrive.
Stack preview
Encoding Tools
Lossless encode/decode helpers for APIs, CLIs, and storage layers.
Keyboard-first workflow
Press ⌘K / Ctrl+K to jump to any tool.
Tool catalog
Reach the right tool in one glance
Organized by workflow-friendly categories. Everything stays visible and predictable.
All tools
Search by name, category, or description.
Base64 encode/decode
Encoding Tools
Open instantly
Open →URL encode/decode
Encoding Tools
Open instantly
Open →HTML escape/unescape
Encoding Tools
Open instantly
Open →Unicode converter
Encoding Tools
Open instantly
Open →JSON formatter/validator
JSON & Markup
Open instantly
Open →JSON diff viewer
JSON & Markup
Open instantly
Open →YAML validator
JSON & Markup
Open instantly
Open →XML formatter
JSON & Markup
Open instantly
Open →CSV to JSON converter
JSON & Markup
Open instantly
Open →Text diff checker
Text Utilities
Open instantly
Open →Text compare tool
Text Utilities
Open instantly
Open →Markdown previewer
Text Utilities
Open instantly
Open →Character counter
Text Utilities
Open instantly
Open →Whitespace remover
Text Utilities
Open instantly
Open →Regex tester & explainer
Regex Tools
Open instantly
Open →Unix timestamp converter
Date & Time Tools
Open instantly
Open →Timezone converter
Date & Time Tools
Open instantly
Open →Date difference calculator
Date & Time Tools
Open instantly
Open →Cron builder/parser
Date & Time Tools
Open instantly
Open →IP lookup
Networking Tools
Open instantly
Open →WHOIS lookup
Networking Tools
Open instantly
Open →HTTP headers inspector
Networking Tools
Open instantly
Open →Bandwidth calculator
Networking Tools
Open instantly
Open →Latency estimator
Networking Tools
Open instantly
Open →Subnet calculator
Networking Tools
Open instantly
Open →CIDR calculator
Networking Tools
Open instantly
Open →Ping
Networking Tools
Open instantly
Open →JWT decoder/generator
Security Tools
Open instantly
Open →OAuth token inspector
Security Tools
Open instantly
Open →CSP header analyzer
Security Tools
Open instantly
Open →Public/private key generator
Security Tools
Open instantly
Open →CSR generator
Security Tools
Open instantly
Open →HMAC generator (SHA-256/384/512)
Security Tools
Open instantly
Open →Hash generator (MD5/SHA/bcrypt)
Security Tools
Open instantly
Open →AES encrypt/decrypt
Security Tools
Open instantly
Open →Quick notes
Friendly + compact
Simple layouts that stay out of the way.
Easy to find
Use search and categories to jump in fast.
Made for everyday tasks
Formatting, converting, checking, and learning—one place.