Vertex Solutions publishes interactive tools that run primarily in your browser. This page explains how we evaluate those tools before and after publication. We do not claim every possible edge case has been exhaustively tested on every device.
What “verified” means here
- Documented behavior — Tool pages state what the tool does, supported inputs, and limitations.
- Formula checks — Calculator math is checked against independently computed sample values where applicable.
- Privacy notes — Whether processing is client-side, and any CDN or third-party dependencies, should match the Privacy Policy and the tool page.
- Known failures — Conversion tools (especially Word ↔ PDF) document layout and fidelity limits honestly.
By category
PDF tools
Typical checks include:
- Valid multi-page files merge, split, rotate, or convert without crashing the UI
- Empty or invalid uploads show clear errors
- Output downloads as expected for representative small/medium files
- Documented limits (memory, fidelity) match real behavior
Image tools
- PNG, JPEG, and WebP paths as advertised
- Resize/compress/crop preserve aspect ratio when locked
- Transparency handling where the format supports it
- Invalid files rejected without silent corruption
Text and developer tools
- Empty input, long input, and Unicode where relevant
- Malformed JSON surfaces validation errors
- Encoding/decoding round-trips for representative strings
- Deterministic outputs for the same input (hash, Base64, UUID version claims)
Calculators
- Formula verification with sample inputs
- Boundary values (zero, negative where invalid)
- Unit handling (metric/imperial for BMI)
- Clear estimate-only language for EMI, GST, BMI, and age tools
Automated sample checks for calculator formulas can be run with npm run verify:calculators in the project repository.
Browser-side processing
Most tools process files and text on the device. Exceptions (for example PDF.js workers from a CDN, or on-device AI model downloads for background removal) are documented on the relevant tool page and in the Privacy Policy. Sitewide analytics (when disclosed in the Privacy Policy) and other page resources are separate from tool file or text processing.
Tool UI badges such as "Browser-based" and "Local processing" refer to where the tool operation runs. They do not mean the page has zero network activity or that third-party scripts never load.
What we do not claim
- Certification by an external auditor
- “Tested on every device/browser combination”
- Guaranteed medical, tax, or legal accuracy for calculator outputs
- Absolute guarantees such as “100% private,” “zero tracking,” or “never leave your device” for the entire page when analytics or third-party scripts/CDNs may be involved
- 100% privacy if a third-party script or CDN is involved for a specific tool
Report a problem
Found a broken tool, wrong calculator result, or outdated limitation note? Use Contact with the tool URL, browser, and steps to reproduce.