For developers
Online tools tagged For developers.
Developer
JSON Formatter
{"ok":true}indented JSON
Developer
Regex Tester
\d+matches 2026
Developer
URL Encoder/Decoder
hello worldhello%20world
Developer
JWT Decoder
eyJhbGci...decoded header, payload
Developer
Cron Generator
every day at 09:000 9 * * *
Developer
Timestamp Converter
01970-01-01T00:00:00Z
Developer
Hash Generator
helloSHA-256 digest
Developer
Base64 Encoder/Decoder
helloaGVsbG8=
Developer
CSV JSON TSV Converter
a,b\n1,2[{"a":"1","b":"2"}]
Calculator
LLM Cost Calculator
1M input tokensper-model cost
Text
Markdown Preview
**bold**bold text
Text
Text Diff
catcats
Color & Design
Box Shadow Generator
0 4px 6px blackshadow CSS
Generator
UUID Generator
5, uppercase5 UUID v4 IDs