Encoding guides
Browse Encoding guides 181-360 of 905. Start with the exact error text and validate locally.
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FAQ
Is anything uploaded? No. Tools run locally in your browser. Validate, repair and convert without uploading files.
Fast workflow: validate -> fix the first real error -> validate again -> export/convert.
Local verification snippet
Run a quick local check before export/convert:
const normalized = token.trim().replace(/-/g, '+').replace(/_/g, '/');
const padded = normalized + '='.repeat((4 - (normalized.length % 4)) % 4);
const raw = atob(padded);
console.log(raw.slice(0, 120));
Privacy & Security
All processing happens locally in your browser. Files are never uploaded.