DevHub

DevHub packs the developer tools you'd otherwise bookmark a dozen different websites for into one native Mac app: timestamp conversion, regex testing, RSA/AES key generation, EXIF extraction, image watermarking, JSON formatting, and dozens more, organized into a single searchable toolbox.

Why it makes the list

Most "online tool" sites for developers are exactly that — online, meaning your data (API keys, tokens, private JSON payloads) passes through someone else's server. DevHub runs every utility locally and offline, so pasting something sensitive into a converter never leaves your Mac. With over 100 tools in one place, it's also just faster than reopening a browser tab for each one.

Standout features

• 100+ utilities covering encoding, conversion, generation, and text processing
• Fully offline — no network calls, no data collection
• RSA/AES key generation and other cryptographic utilities
• EXIF extraction and image watermarking for photo workflows
• Fast fuzzy search across every tool by name
• Native Swift app, lightweight and fast to launch

Pricing

Completely free and open source.