Privacy & File Tools
Local-first utilities for inspecting, preparing, and safely sharing files and sensitive text. Choose from 16 focused tools below.
EPUB Metadata Editor
Inspect EPUB file details and create a clean metadata checklist before publishing.
Audio ID3 Tag Editor
Inspect audio file properties locally and prepare a consistent tag-editing checklist.
CSV Diff Viewer
Compare pasted CSV data and identify changed rows, columns, and values.
CSV Column Mapper
Map CSV headers into a clean, reusable field list without uploading data.
JSON Lines Viewer
Inspect JSON Lines data, count records, and validate each line locally.
HAR Viewer & Redactor
Inspect pasted HAR JSON and flag tokens, cookies, and sensitive query parameters.
ENV Secret Redactor
Find likely credentials in environment files and create a share-safe redacted copy.
SVG Sanitizer
Check SVG markup for scripts, event handlers, and external references before sharing.
AVIF & WebP Metadata Checker
Inspect modern image files locally before publishing or sharing them.
GIF Frame Inspector
Inspect GIF file details and prepare it for frame extraction or optimisation.
Markdown Front Matter Validator
Validate YAML front matter and highlight missing publishing fields.
ICS Calendar Validator
Check iCalendar event text for required fields and malformed dates.
MIME & File Signature Inspector
Inspect a local file name, MIME type, size, and SHA-256 fingerprint.
Base64 Image Inspector
Inspect a Base64 image data URI and report its format and approximate size.
ZIP Manifest Viewer
Inspect a ZIP archive locally before sharing it.
Semantic Version Comparator
Compare semantic versions and explain which release is newer.