Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Check a video title and tags list against YouTube's published character limits.
This tool checks your video title against YouTube's documented 100-character title limit, and your comma-separated tags list against the documented 500-character total tags limit.
Enter your title and tags (comma-separated). Length checks for both appear instantly.
The title check is straightforward: the number of characters in the title box is compared with 100. The tags check is a little less obvious. Your tags are split on commas, each tag is trimmed of surrounding spaces, empty entries are dropped, and the tags are then joined back together with a single comma between them. The length of that joined string is what gets compared with 500. In other words, spaces after commas in your list are not counted, but the commas between tags are. Spaces inside a multi-word tag, such as home workout plan, do count.
Suppose a hypothetical tag list is: budget travel, backpacking tips, cheap flights, hostel guide. The tags are budget travel (13 characters), backpacking tips (15), cheap flights (13) and hostel guide (12). Together that is 53 characters, plus 3 commas, giving 56. You would have 444 characters of headroom. Now imagine a list of 60 short tags; the commas alone would take up 59 characters, so long lists reach the limit sooner than you might expect from counting words alone.
Tags are best used for spelling variants, common misspellings, and closely related phrases that do not fit naturally in the title or description. Put your primary topic first. Do not add tags that are unrelated to the video just because there is space left; that is against the platform's policies and gains nothing. If your tag total is under the limit, you do not need to fill the remaining space.
A pass means both fields are within the documented character limits. It says nothing about whether the title is compelling or the tags are relevant. When either row is flagged, shorten the text first and remove the least relevant tags, rather than just cutting characters from the end of a phrase, which can leave a title that reads awkwardly.
This tool checks only characters. It does not check whether tag characters are allowed by the platform, does not measure how much of your title displays in a given placement, and does not evaluate search demand. The limits used are the ones the platform documents at the time of writing; if the studio editor reports a different number, trust the editor. The tags limit only matters when you enter tags through the studio field, and separate per-tag rules may apply there as well.
YouTube has stated tags play a minor role compared to title, description, and thumbnail/click-through-rate -- but staying within the limit still matters since exceeding it can prevent saving.
No. Spaces around commas are trimmed before the length is calculated, so they do not count toward the 500 total.
Studio may treat quotation marks, hyphens or special characters differently. Use this tool as a planning check and confirm inside Studio before publishing.
Not necessarily. Tags play a small part compared with your title, description and thumbnail, so an empty field is acceptable if your other metadata is strong.
Not needed. Shorter titles often display in full and read better, so 100 is a ceiling, not a target.
Reference: Google Search Central