One task. A useful result.

Video and subtitles

Timestamp links, video chapters, and text subtitle conversion.

• Video timestamp link Add a timestamp to a YouTube or other video link and copy the result.
• Video chapter editor Check timestamp order and prepare a clean chapter list for a video description.
• Subtitle converter Convert SRT to WebVTT and back without uploading a file.

Data formatting

Validate and format text structures into a readable form.

• JSON formatter Format and validate JSON without network requests.
• JWT decoder Decode JWT header/payload, exp/iat/nbf, and warnings without signature verification.
• Regex tester Test a regular expression, flags, matches, groups, and indexes on local text.

Encoding

Local string encoding and decoding.

• Base64 codec Base64 and Base64URL encode/decode.
• URL codec URI encode/decode for query strings and path fragments.

HTTP headers

Inspect response headers, cache policy, and security headers.

• Headers inspector Summarize cache policy, security headers, and duplicates.

Network calculations

Basic addressing and network range calculations.

• CIDR calculator Calculate IPv4/IPv6 network, range, broadcast/last address, and usable addresses.

Security helpers

Generate and inspect baseline security settings.

• Security headers generator Generate a baseline HTTP security header set.