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