Advertising material preflight checker

Check your material locally

Files and entries stay in this page. This checker does not upload files, use AI, open the destination URL or save a purchase. Copy or download the report before leaving.

Local file (optional)

File size is measured in bytes. Dimension decoding supports PNG, JPEG, GIF and WebP up to 20 MiB; other formats and larger files keep dimensions unknown.

Maximum file size in bytes (optional)

Enter the publisher’s explicit limit. 1 KiB = 1,024 bytes; 1 KB may instead mean 1,000 bytes. Confirm the stated unit.

Required image width in pixels (optional)

Required image height in pixels (optional)

Copy to check (optional)

Counts Unicode code points. Combining marks and joined emoji can count as several; the publisher may use a different counting rule.

Maximum Unicode code points (optional)

Destination URL (optional)

HTTPS syntax only. The destination is never opened or requested.

Local check report

Choose optional material and enter only requirements stated in the original, then run the checks.

No checks run. Entries are not saved.