170+ Free Browser-Based Developer Tools — No Login, No Upload, 100% Private

Hey DEV community! 👋

We built AllOmnitools because we hated the friction of online tools: signing up, uploading files, dealing with ads, or worrying about privacy.

So we created 170+ free online tools that run 100% in your browser — no login, no uploads, no tracking.

What We Offer for Developers

Code & Text Tools

• Diff Checker — Side-by-side comparison highlighting additions, deletions, and line differences [源]
• JSON Formatter — Validate and pretty-print JSON
• Markdown Preview — Live Markdown renderer showing HTML output in real-time
• Regex Tester — Test regular expressions instantly
• Base64 Encoder/Decoder — Encode/decode text and files
• JWT Decoder — Decode JSON Web Tokens without a server

Calculators

• Scientific Calculator — Trigonometry, logarithms, constants, complex expressions [源]
• GST/VAT Calculator — Compute business tax for India, Nepal, Europe [源]
• BMI, EMI, Age, Date/Time calculators

Converters

• Unit converters (length, weight, temperature, etc.)
• Text encoders (URL, HTML, Unicode)
• Format converters (XML, CSV, YAML)

Utility Tools

• QR Code Generator
• Password Generator
• Certificate and hash tools