Looking for a free or open-source alternative to TinyPNG Pro? Shrinkray is the closest direct swap — MIT-licensed source on GitHub, or a $19 one-time packaged install. Since you're already auditing what you pay TinyPNG Pro every month, here are four more pay-once tools from the same catalog worth a look while you're at it — different jobs, same idea: buy the software once instead of renting it forever.
1. Shrinkray — replaces TinyPNG Pro
Batch-compress a thousand photos locally — JPG, PNG, WebP, AVIF — no upload limits. $19 once vs TinyPNG Pro's ~$39/yr + API fees. Free on GitHub, or the packaged installer on Whop.
See Shrinkray → · Source on GitHub
2. Upwatch — HTTP checks, incident log, alerts and a branded 90-day status page — on your own box.
Replaces UptimeRobot ($8/mo). $39 once. See Upwatch →
3. Trimly — Branded short links, QR codes and click analytics — on your domain, in your SQLite file.
Replaces Bitly ($29/mo). $29 once. See Trimly →
4. Billcraft — Clients, invoices, PDFs, share links & recurring billing — on hardware you control.
Replaces FreshBooks ($19/mo). $39 once. See Billcraft →
5. Bookslot — The Calendly you actually own — timezone-correct booking with email + ICS invites.
Replaces Calendly ($10/user/mo). $39 once. See Bookslot →
Why this list is worth bookmarking
Every app above is a one-time purchase with MIT-licensed source, no accounts with us and no telemetry. None of them are trying to be the next TinyPNG Pro — they're trying to be the last subscription you pay for that specific job.
Try Shrinkray — $19, once
Batch-compress a thousand photos locally — JPG, PNG, WebP, AVIF — no upload limits.