BoltKit

10 essential developer tools, completely free — chmod, cron, epoch, Base64, subnet, DNS, HTTP codes, JSON, regex, and JWT. No ads, no IAP, private by design.

BoltKit puts 10 essential developer tools in one beautifully crafted app — right on your iPhone and iPad. Everything is completely free.

ALL 10 TOOLS — FREE • ChmodCalc — Unix file permissions calculator with interactive checkbox grid, octal and symbolic output, and common presets. • CronBuilder — Build cron expressions visually with field editors, quick presets, human-readable descriptions, and next-run previews. • EpochTime — Convert between Unix timestamps and human-readable dates with a live ticker, bidirectional conversion, and timezone picker. • Base64Lab — Encode and decode Base64 with support for URL-safe variants and automatic input detection. • SubnetCalc — IP subnet calculator with CIDR slider, network/broadcast addresses, usable host range, and binary view. • DNSLookup — Query DNS records via DNS-over-HTTPS using Cloudflare or Google resolvers. Supports A, AAAA, MX, CNAME, TXT, and more. • HTTPCodes — Searchable HTTP status code reference grouped by category — 1xx through 5xx with descriptions and usage notes. • JSONPretty — Format, validate, and minify JSON with syntax highlighting and a collapsible tree view. • RegexLab — Test regex patterns with live matching, capture group extraction, flag toggles, and a library of common examples. • JWTInspect — Decode and inspect JWT tokens — view header, payload, signature, algorithm, and expiry status at a glance.

Every tool includes unlimited saves, full history, and export/share — no limits, no paywalls, no in-app purchases.

PRIVACY FIRST BoltKit runs entirely on your device. No accounts, no tracking, no analytics, no data collection. Your data never leaves your iPhone or iPad.

Built with Apple's Liquid Glass design for iOS 26. Zero third-party dependencies.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://boltkit.app/privacy-policy.html Terms of Service: https://boltkit.app/terms-of-service.html