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512kb.club
In short: Getting listed on 512KB Club is free. Plan for about 45 minutes — there is material to prepare and a review to wait on.
What they ask for: If your site's uncompressed size is under 512 KB, submit it via the GitHub repo.
If your site's uncompressed size is under 512 KB, submit it via the GitHub repo.
Your page weight is checked; heavy sites are rejected.
Open the submission page on 512kb.club and complete its form — that is the "Open submit page" link at the top of this page.
Your page weight is checked; heavy sites are rejected.
Priority sets the band — this one is later. Cost (free) and effort (moderate) move it within that band, which puts it in the long tail tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.