Developer Tools 7 min readBy DigiMetrics Hub TeamPublished
Best Free Online Tools for Developers (2026)
The most useful free online tools for developers in 2026 — from JWT decoders and JSON formatters to API testers and DNS lookups.
Every developer keeps a tab open with their favorite utility tools. Here's our curated list of the best free ones in 2026 — most of which we've built right into DigiMetrics Hub.
Network & Debugging
- IP Lookup — see your IP, ASN and geolocation
- DNS Lookup — query any record type
- WHOIS — see registration info
- HTTP Header Checker — inspect response headers
All four tools are free on our home page.
Open ToolsSecurity
- SSL Checker — verify cert chain and expiry
- JWT Decoder — instantly decode tokens
- Password Generator — strong cryptographic passwords
- IP Blacklist Checker — see if your IP is flagged
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Performance
- Speed Test — browser-based connection test
- Website Down Checker — is it just you?
Content & SEO
- Word Counter — count words, chars, reading time
- Robots.txt Generator — quick file builder
Why Use Browser-Based Tools
No installs, no data leaving your machine for client-side tools, and they work on every OS. Bookmark them and you've got a portable toolbox.
Browse our full toolkit on the home page.
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