Developer tools

All utilities live under /tools. Pick a tool below.

JSON FormatterPopular

Format, validate, and explore JSON with syntax highlighting and an interactive tree view.

Markdown Preview

Live Markdown preview with export HTML/PDF, copy, reset, and synced scrolling.

Base64 Encoder

Encode text or files to Base64. Supports URL-safe variant and MIME line breaks.

Base64 Decoder

Decode Base64 strings back to plain text. Supports standard and URL-safe Base64.

URL Encoder

Percent-encode URLs, URI components, and query strings instantly.

URL Decoder

Decode percent-encoded URLs and URI components back to plain text.

PDF to Base64

Encode a PDF file to Base64 and a data URI in your browser.

Base64 to PDF

Decode Base64 or a data URI back to a PDF with preview and download.

Diff Checker

Compare two texts side-by-side with line-by-line and character-level diff highlighting.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512, and bcrypt hashes. Runs entirely in your browser.

Slug Generator

SEO-friendly URL slugs from titles — separators, max length, stop words, bulk lines, URL preview.

Password Generator

Cryptographically random passwords — length, charset, ambiguous exclusion, entropy estimate, batch copy.

World Clock

Compare current times across multiple timezones with a scrollable 24-hour view. DST-aware.