YouTube metadata length and formatting checker
Validate pasted video titles, descriptions and tags before uploading.
Your inputs
Your results
Ready when you areYour results will appear here.
How it works
Check supplied title code points, UTF-8 description bytes, forbidden angle brackets and documented aggregate tag counting. Report duplicate tags separately.
Read the source reference ↗A few things to know
Platform enforcement may differ for Unicode edge cases. No upload, account access, topic quality score, ranking prediction or current video lookup is performed.
When to use this tool
Check technical metadata limits before uploading. Non-ASCII description text can use several UTF-8 bytes per displayed character.
- Check a translated description.
- Review a tag list.
- Preflight a title.
How to use youtube metadata length and formatting checker
Prepare the inputs
Paste your title and description.
Choose the settings
List tags one per line.
Review and export
Review any flagged fields and recheck after editing.
Try the supplied example
Inputs
title: How to organize your invoices; description: A practical guide to tracking overdue invoices.; tags: invoices small business bookkeeping
Result
The supplied metadata falls within the documented title, description and tag bounds.
What it means
Passing these checks says nothing about relevance, discoverability or moderation.
Common mistakes to avoid
An emoji is not necessarily one byte
An emoji is not necessarily one byte.
Valid length does not imply useful metadata
Valid length does not imply useful metadata.
Frequently asked questions
Definitions, edge cases, and practical next steps for this tool. Search all tool FAQs ↗
Are descriptions counted in characters?
The referenced API documents a 5,000-byte bound, so this tool counts UTF-8 bytes.
How are titles counted?
This tool counts Unicode code points, excluding forbidden angle brackets; platform edge-case enforcement can differ.
How are tags counted?
Tag characters, separating commas and two quote characters for tags containing spaces contribute to the documented 500 limit.
Can I use comma-separated tags?
Enter one tag per line here so a comma within a tag is unambiguous.
Does passing guarantee an upload?
No. Account, policy, format and platform-side checks still apply.
Does this predict rankings?
No. It checks technical formatting, not performance.
Are my inputs uploaded or stored?
Processing happens locally in your browser. This tool does not upload inputs. Downloads stay on your device; sharing or opening them in another service is your choice.
What should I check before using the output?
Platform enforcement may differ for Unicode edge cases. No upload, account access, topic quality score, ranking prediction or current video lookup is performed.
Explore the topic in the blog
Sources and method
Use the references below to check definitions and platform guidance. The model’s scope and limits are explained above. Read our editorial standards.