Developer Tools

JSON, JWT, Base64, hashes, formatters and references — all processed locally.

31 tools · Private · Browser-only

Date & time

Unix Timestamp Converter

Unix time to readable date.

Open

Epoch Converter

Epoch seconds and milliseconds.

Open

Security

Password Generator

Secure random passwords.

Open

Password Strength Checker

Check password strength locally.

Open

Hash Generator

SHA-256, SHA-384, SHA-512.

Open

JSON

JSON Formatter

Pretty-print JSON.

Open

JSON Validator

Validate JSON syntax.

Open

JSON Minifier

Compress JSON to one line.

Open

JSON Beautifier

Beautify and indent JSON.

Open

JWT Decoder

Decode JWT header and payload.

Open

Identifiers

UUID Generator

Generate UUID v4.

Open

UUID Validator

Validate UUID format.

Open

Encoding

Base64 Encoder & Decoder

Encode and decode Base64.

Open

URL Encoder & Decoder

Percent-encode and decode URLs.

Open

Formatting

HTML Formatter

Indent HTML markup.

Open

CSS Formatter

Format CSS stylesheets.

Open

SQL Formatter

Format SQL queries (never executed).

Open

XML Formatter

Indent XML documents.

Open

YAML Formatter

Clean up YAML formatting.

Open

Testing

Regex Tester

Test JavaScript regular expressions.

Open

Markdown Preview

Preview Markdown as HTML.

Open

Cron Expression Parser

Parse cron schedule fields.

Open

Text Diff Checker

Compare two pieces of text.

Open

Networking

Subnet Calculator

Hosts in a CIDR block.

Open

MIME Type Lookup

Common MIME type descriptions.

Open

HTTP Status Code Lookup

HTTP status code meanings.

Open

References

Color Converter

HEX, RGB and HSL.

Open

Files & media

QR Code Generator

Make a QR code from text or a URL.

Open

Image Resizer

Resize, convert and strip metadata.

Open

PDF Tools

Merge, split and visually sign PDFs.

Open

Data

CSV ↔ JSON Converter

Convert tabular data locally.

Open