What does the evidence freshness checker produce?
Compare evidence dates and recorded review dates against a frozen review date and your selected maximum age. Identify overdue, due-today, future-dated, invalid and stale records.
The working area above runs the supported validator in the browser. It keeps the result inspectable and preserves every unresolved item for responsible review.
What do you need before you start?
- Define and authorize the source population. Keep the exact original source separately.
- Use UTF-8 CSV, rectangular text dataset JSON or one-sheet text-cell XLSX starting at A1. Limits are 10 MB, 5000 data rows, 50 columns, 100000 cells and 5000000 parsed characters. Formulas, macros, additional sheets and numeric date cells are rejected.
- Select a frozen review date and maximum calendar-day age from your approved evidence policy. No legal age limit is inferred.
What information do you enter?
Prepare only the bounded inputs listed below for this validator.
- One evidence record per row. Use Evidence reference, Evidence date, Review date and Owner, or the displayed aliases.
- Exact YYYY-MM-DD dates from 1900 through 2200. Missing dates and duplicate references cannot establish a freshness pass.
- Frozen review date and a whole maximum age from 0 through 110000 days. Age equal to the maximum passes.
| Field | What to enter | Fictional example |
|---|---|---|
| Frozen review dateRequired | Use a real YYYY-MM-DD date from 1900 through 2200. The browser clock does not select this date. | 2026-10-06 |
| Maximum evidence age (calendar days)Required | Enter a whole number from 0 through 110000. Age equal to the limit passes. This is your policy, not an inferred legal requirement.Accepted range 0 to 110000. | 30 |
What you can download
Every result must identify its supplied facts, assumptions and unresolved items.
| Free result | Included downloads |
|---|---|
Enter your information, inspect the on-screen result and keep a browser backup. Editing and direct copies of your entered information stay free. |
These supported outputs are free. No checkout is required. |
Fictional temporal review (PDF). Editable review (DOCX). Complete fictional pack (ZIP). Fictional source dataset (JSON). Requires tailoring. Samples use the finalized renderer. Keep real source and result files private.
How does the evidence freshness checker work?
- 1Select the actual source
Import a supported local source or load the clearly fictional example. Inspect headings and preserve the exact original download.
- 2Freeze your review inputs
Select your review date and maximum age. These values freeze the comparison and remain visible in the result.
- 3Inspect every row
Review calendar-day age, days until review, overdue reviews, reviews due today and future-dated evidence. Invalid rows remain unresolved.
- 4Keep the review and original
Download complete source and result JSON or CSV free. Purchase the seven-file finalized pack after review. The pack contains original parsed values and must remain private.
Method and sources
Apply the steps above to the supported inputs. Use the listed source sections to review the rule basis, assumptions and limits.
- Security and Privacy Controls for Information Systems and OrganizationsOrganization-defined monitoring metrics and assessment frequencies. This reference does not set an evidence-age limit or establish a private organization obligation. CA-7. Continuous Monitoring.National Institute of Standards and Technology. Reviewed 2026-10-06.
- Information Security Continuous Monitoring for Federal Information Systems and OrganizationsContext for ongoing visibility into assets, threats and security-control effectiveness. Federal guidance does not supply a private evidence-age policy or authenticate records. Continuous monitoring strategy and program.National Institute of Standards and Technology. Reviewed 2026-10-06.
Common questions
What information does the evidence freshness checker need?
Enter one evidence record per row. Use Evidence reference, Evidence date, Review date and Owner, or the displayed aliases; exact YYYY-MM-DD dates from 1900 through 2200. Missing dates and duplicate references cannot establish a freshness pass; frozen review date and a whole maximum age from 0 through 110000 days. Age equal to the maximum passes. Define and authorize the source population. Keep the exact original source separately.
What does the evidence freshness checker produce?
Complete row-level timestamp offsets or evidence freshness findings. Free complete parsed source and result JSON, CSV and unchanged original source download. Seven-file finalized pack with formal PDF and DOCX, Excel, CSV, complete source JSON, hashes and instructions. Review unresolved findings and limitations before use.
Who makes the final decision?
A responsible person reviews the result. Freshness uses your selected age and review dates. It does not determine legal retention, authenticate evidence or prove current relevance. A recent record may still be superseded or revoked.
Is this tool free?
Yes. The on-screen result and listed downloads are free. No checkout is required. Keep local backups and review the stated method and limits.
Can I use the evidence freshness checker for this task?
Compare evidence dates with coverage requirements. Freshness uses your selected age and review dates. It does not determine legal retention, authenticate evidence or prove current relevance. A recent record may still be superseded or revoked.
What still needs review?
Freshness uses your selected age and review dates. It does not determine legal retention, authenticate evidence or prove current relevance. A recent record may still be superseded or revoked.
Review dates earlier than evidence dates, future-dated evidence and missing owners remain unresolved. Calendar-day arithmetic uses UTC date boundaries.
PDF and DOCX summaries show the first 100 result rows. Complete source and results remain in Excel, CSV and JSON. CSV uses spreadsheet-safe review escaping. JSON preserves exact parsed text.