Browser-only strengths
Local tools reduce processing exposure for text, small files, image rendering, metadata checks, URL cleaning, and checksums. They can be transparent and require no account.
Browser-only limits
Browsers have memory limits and may not support advanced OCR, collaboration, enterprise access control, large PDFs, digital signatures, or complex document sanitization.
Upload-based strengths and risks
Server tools may offer advanced processing and team workflows, but the file leaves your device. Review encryption, access, retention, training use, subprocessors, data location, and deletion behavior.
Practical decision rule
Use the least-exposing method that reliably completes the task. When advanced server processing is necessary, choose an approved provider and share only the minimum data.