Developer & Indie Hacker Toolkit

Format, validate, and minify JSON data with syntax error highlighting

Decode JWT tokens locally — no upload, no tracking, no server

10-step wizard generates GDPR / CCPA / App Store privacy policy — free, no signup

Estimate token count and API cost for GPT-4o, Claude, Gemini, Llama — 10 models

Encode text to Base64 or decode Base64 to text. UTF-8 safe, URL-safe variant

Compute MD5, SHA-1, SHA-256, SHA-512 hashes. 100% in-browser

Generate RFC 4122 random UUIDs. Cryptographically secure, unlimited

Cryptographically secure passwords with strength meter (entropy bits)

Detailed password analysis — entropy, crack time, common password check, and suggestions

Percent-encode URLs (RFC 3986) — encodeURIComponent and encodeURI modes

Test regular expressions with live highlighting, capture groups, flags

Convert Unix timestamps to readable dates (and vice versa). Seconds & ms

Convert between CSV and JSON. Auto-detect delimiter (comma, tab, semicolon)

Generate JSON-LD structured data for 12 schema types — boost SEO

Paste HTML, capture beautiful screenshots — gradients, shadows, rounded

Visual gradient builder — linear, radial, conic with live preview and one-click copy

Generate Gmail/Outlook-compatible email templates — welcome, promo, notification, newsletter

Scan and clean cookies, storage, cache — one-click privacy cleanup

Get a disposable email address instantly — receive-only, no signup, auto-refresh inbox