目標檔案大小
精準位元組數Standard Platform Upload Limits
Select standard platform ceilings to test file upload limits:
Negative & Malformed Test Files
Generate damaged files to verify that upload validations reject corrupted media with proper error codes (400/422):
Client-Side File Validator
Drop any image to verify exact byte count, magic bytes hex, and SHA-256:
指定檔案大小測試圖像產生器
準確測試檔案上傳限制、Cloudinary/S3 上傳上限以及極限值錯誤。
Off-By-One Boundary Testing
Test precision validation boundaries (e.g. 5,242,879 B vs 5,242,880 B vs 5,242,881 B) to ensure client forms and backend services enforce exact inclusive/exclusive thresholds.
Malformed Header & Stress Tests
Verify whether upload endpoints handle truncated streams, zero-byte files, and corrupted magic signatures gracefully without unhandled runtime exceptions or 500 crashes.
Display Calibration & Bit-Depth
Use standard SMPTE color bars, 16-step quantization ramps, and sharpness targets to test downscaling algorithms, chromatic subsampling (4:2:0 vs 4:4:4), and compression banding.
精準位元組數測試圖片、元資料填充與上傳邊界測試指南
生成嚴格符合 1 KB 至 50 MB 目標位元組數的 PNG/JPEG 測試圖片，用於表單校驗與伺服端上傳配額邊界測試。
單一邊界值分析 (Boundary Testing)
透過 -1 位元組與 +1 位元組邊界檔案，嚴格驗證檔案上傳介面是否能準確觸發 HTTP 413 錯誤與校驗攔截。