Web

HAR viewer

Inspect a HAR (HTTP Archive) export from your browser's network tab — requests, status, size, timing and a waterfall.

HAR JSON

Local only — a HAR can contain sensitive headers and cookies, so nothing leaves your browser or appears in the URL.

Related tools

PDF signature & annotator

Stamp a visual signature, text, date or check mark onto a PDF. Runs entirely in your browser — the file is never uploaded. This is a visual stamp, not a cryptographic digital signature.

Certificate decoder

Decode an X.509 certificate or CSR: subject, validity, SANs, key, and fingerprints.

EXIF viewer & remover

View an image's EXIF metadata (including GPS) and download a metadata-free copy. Runs entirely in your browser.

Image format converter

Convert images between PNG, JPEG, WebP and AVIF, with optional resizing and quality control. Runs entirely in your browser.