SYNTAX / BROWSER UTILITIES
Small tools.
Right where you need them.
Format a payload, inspect a value, or check a color pair. These tools run in your browser; inputs are not uploaded.
01 / STRUCTURED DATA
JSON formatter
Validate and format a JSON value before you pass it along.
Ready.
02 / TEXT CONVERSION
Base64
Encode UTF-8 text or decode a Base64 string. This handles Unicode text.
Ready.
03 / URL COMPONENTS
URL encoder
Encode or decode a single URL component, including spaces and non-ASCII text.
Ready.
04 / CRYPTOGRAPHIC DIGEST
SHA-256
Generate a SHA-256 digest for a text value. A hash is not encryption.
Ready.
05 / UTC TIME
Timestamp converter
Convert Unix seconds, milliseconds, or an ISO date to a UTC timestamp.
Ready.
06 / IDENTIFIER
UUID v4 generator
Create a random UUID using the browser's cryptographic random number generator.
Ready.
07 / ACCESSIBILITY CHECK
Color contrast
Check the contrast ratio of two colors against WCAG text thresholds.
Contrast updates as you choose colors.
08 / PATTERN TEST
Regular expression tester
Test a JavaScript regular expression against sample text. Runs in a disposable local worker.
Matches stay in this browser tab.
09 / WRITING PREVIEW
Markdown preview
Preview headings, lists, emphasis, and code. HTML and links stay as plain text.
Safe preview. Raw HTML is not rendered.
10 / TEXT COMPARISON
Line diff
Compare two text versions. Changed lines are marked; comparisons stay local.
Insertions and removals are shown in order.
11 / RANDOM VALUE
Password generator
Generate a random string with the browser cryptographic random number generator.
Generated values are not stored or transmitted.
12 / TEXT TRANSFORM
Case converter
Convert words between common identifier styles.
Camel, Pascal, snake, kebab, constant, title, and sentence case.
13 / TOKEN INSPECTOR
JWT decoder
Decode a JSON Web Token header and payload without sending it anywhere.
This does not validate the signature, issuer, or claims. Treat decoded values as untrusted.
14 / QUERY READABILITY
SQL clause formatter
Lay out common SELECT clauses for easier reading. This is a text formatter, not a dialect parser.
Quoted strings and SQL comments are left untouched where possible.