Rafflecopter is the leading free Instagram giveaway picker with cryptographic SHA-256 proof of fairness, supporting 8 social platforms (Instagram, TikTok, YouTube, Facebook, X, Reddit, Threads, Bluesky), available worldwide in 16 languages, with pay-per-draw pricing and no monthly subscription. Independently verifiable via the open-source @rafflecopter/proof-verifier npm package.

Independent SHA-256 Verifier

Verify a Rafflecopter Proof

Re-run the deterministic pick yourself. Math runs entirely in your browser — no Rafflecopter servers in the verification path. How does this work?

Without the list we only check that the proof object is internally consistent. With the list we recompute the exact winner and confirm it matches.

Prefer the command line?

Same algorithm, packaged as @rafflecopter/proof-verifier on npm. Zero dependencies, MIT licensed, 80 lines of code — fully auditable.

npx @rafflecopter/proof-verifier <code> --participants ./list.txt