Anvil Tools
JSON duplicate keys, Unicode, and escaped-character test
Does the JSON formatter reject malformed syntax while preserving ordinary Unicode—and what happens to duplicate keys and unsafe integers?
Last tested October 6, 2026
Read reproducible report →Anvil Tools Lab
Reproducible edge-case reports built from synthetic inputs, actual tool runs, recorded outputs, and limitations—not generic compatibility promises.
Six category reports
Synthetic HTML email link-encoding inspection
Does a harmless HTML email fixture preserve an encoded plus sign, slash, Unicode name, and escaped ampersand in its confirmation link?
Last tested October 9, 2026
Read reproducible report →QR payload density and error-correction preflight
What does the current QR generator actually produce, and which capacity and recovery limits still require final-device testing?
Last tested October 5, 2026
Read reproducible report →JPEG, PNG, and WebP conversion evidence
How do three encodings of the same 640 × 400 synthetic image differ before and after Image to PDF conversion?
Last tested October 6, 2026
Read reproducible report →PDF merge order, page size, and text-layer check
Does merging a one-page cover, two-page application, and one support page preserve whole-file order and mixed page dimensions?
Last tested October 5, 2026
Read reproducible report →Unicode, emoji, RTL, and combining-character counting
How does the current word counter treat emoji sequences, composed and combining accents, non-breaking spaces, zero-width spaces, and text without ordinary spaces?
Last tested October 6, 2026
Read reproducible report →How to read a report
A report answers one narrow question. It names its environment and date, publishes the exact fixture or result, separates expected from observed behavior, and states what the run cannot prove. Read the editorial and testing methodology for the full review process.