utilities.dev
Toggle theme
Essential developer tools for everyday coding tasks
Simple, fast, and free online utilities
All Utilities
10 utilities
Encoding
Base64 Encoding
Encode and decode Base64 strings to safely move text and binary content through text-only systems.
encoding
base64
decode
+2
Design
Color Converter
Convert colors between HEX, RGB, HSL, and HSV with instant previews for design and frontend workflows.
color
hex
rgb
+5
Development
Cron Expression Parser
Parse cron expressions into human-readable schedules and preview upcoming run times before deployment.
cron
schedule
parser
+3
Development
Text Diff Tool
Compare two text blocks line by line to spot additions, removals, and edits during reviews.
diff
compare
text
+4
Formatting
JSON Formatter
Format, validate, and minify JSON with clear error feedback for API and configuration workflows.
json
format
validate
+3
Security
JWT Decoder
Decode JWT tokens to inspect header and payload claims while debugging authentication flows.
jwt
token
decode
+3
Formatting
Markdown Viewer
Preview and analyze Markdown with live rendering, formatting tools, and document statistics.
markdown
md
preview
+6
Testing
Regex Tester
Test regular expressions with live match results, capture groups, and flag-aware debugging output.
regex
regular expression
pattern
+3
Design
SVG Viewer
Preview, validate, and optimize SVG markup with live rendering for frontend and design workflows.
svg
vector
graphics
+5
Development
Unix Timestamp Converter
Convert Unix timestamps and human-readable dates with support for seconds and milliseconds.
unix
timestamp
epoch
+4