CSVQBO

CSVQBO prepares bank and credit-card transaction files for review and compatible imports. It accepts CSV or a values-only, single-sheet XLSX for one account and currency. Normalized CSV and XLSX are available; generating QBO, QFX or OFX is a separate step on the result page.
Choose date order and decimal separator, confirm detected headers or set exact header overrides, and check signed amounts. Amount takes precedence over split Debit/Credit; split values use credit minus debit. Sign reversal and exact-row deduplication are optional. Identical genuine payments can look duplicated; review before removing them.
Preview and CSV/XLSX need no bank identity or balance. Web Connect generation requires your bank/account identifiers, FID, organization, authorized Intuit BID and actual closing ledger balance at the latest included date. Acceptance depends on the bank and software and has not been verified in a live importer; OFX generation is not Intuit certification.
Free after registration, no card: 2 complete files per account, up to 200 source transactions per file, including preview and all supported download formats. Each site allows 12 successful free files per network address in a rolling 30 days, shared across accounts. Free uploads allow 20 requests per account and network address per hour, including failures and date-order retries. Repeated downloads of the same result and failed conversions use no file allowance. When the free size or allowance is exceeded, buy an existing one-time pack and upload in paid mode. Normal supported-format limits and validation still apply; no free row truncation. Limits are 15 MiB and 3,000 transactions; XLS and formulas are unsupported. Content expires within 24 hours. One-time packs cost $9 for 10 files or $29 for 50; unused credits do not expire while the account exists. Any pack purchase has a 7-day full refund promise if dissatisfied, even with used credits.
Disclosure: I built this.