How to use UUID Extractor to extract UUIDs from text
Put text in Input text or load a file with Upload. UUID Extractor checks bare values, curly-braced values, and urn:uuid: values, then updates Output text and the extracted details as you change the input or matching options.
Extract GUIDs from logs and files
- Paste log output into
Input text, or selectUploadand choose a text file. - Keep the matching options selected, or change them for the UUID forms and display you need.
- Read the newline-separated values in
Output textand the rows underExtracted UUID details. - Select
Copyfor the output, or selectDownloadto saveuuids.txt.
With the default settings, this excerpt produces four displayed values:
request_id=123e4567-e89b-12d3-a456-426614174000
COM object {550E8400-E29B-41D4-A716-446655440000}
Resource urn:uuid:9125a8dc-52ee-365b-a5aa-81b0b8dcb8e9
Session 00000000-0000-0000-0000-000000000000123e4567-e89b-12d3-a456-426614174000
{550e8400-e29b-41d4-a716-446655440000}
urn:uuid:9125a8dc-52ee-365b-a5aa-81b0b8dcb8e9
00000000-0000-0000-0000-000000000000UUID format and cleanup options
Unique onlykeeps the first occurrence of each UUID. It compares values without regard to letter case and treats braces or theurn:uuid:prefix as formatting. Clear it to keep repeated and overlapping matches.Curly-braced formatincludes values wrapped in braces.urn:uuid: formatincludes values with that prefix. Bare UUID matching remains on.Include nil UUIDcontrols the all-zero value,00000000-0000-0000-0000-000000000000.Strip braces/prefixchanges the displayed value while the table keeps the match format.Uppercasechanges displayed letters to uppercase; when it is clear, letters are lowercase.
What the UUID details table reports
Each row contains UUID, Format, Version, Variant, Line, and Context. Version uses the first character of the third UUID group, so the table can show v1 through v8, Nil, or Unknown. Variant uses a character in the fourth group and can be RFC 4122, NCS, Microsoft, or Reserved.
The classifications come from characters in the matched value. They do not identify its source or generation history. A match can also be a UUID-shaped substring inside surrounding text.
When to use this UUID extractor
Request logs can be reduced to UUID values while the details table keeps each source line and nearby context. Configuration exports can retain braced CLSIDs or URN values, then display them with braces and prefixes removed or with uppercase letters.
For a broader text job, Text Parsing & Data Extraction lists the other extractors. Use Custom Regex Extractor for a pattern that is not a UUID, or Extract Lines Containing a String for whole lines containing a word or regular expression.
File reading and extraction run in the browser, and the local script does not send the input text in a network request. When no UUID matches, the results area stays hidden, and Copy and Download remain disabled.
Frequently asked questions
How do I extract UUIDs from a log file?
Select Upload, choose the file, and read the extracted values and source lines. You can also paste the log into Input text.
Does UUID Extractor find GUIDs with braces or a URN prefix?
It finds bare UUIDs, curly-braced values, and urn:uuid: values when the matching options are enabled. Unique only can combine overlapping forms of the same UUID.
Why are repeated UUIDs missing from the output?
Unique only is checked by default, so repeated values are reduced to the first retained occurrence. Clear it to keep repeated matches and overlapping bare, braced, or URN forms.
Does the UUID version prove how the identifier was generated?
No. Version and Variant classify characters in the matched UUID. The tool does not check generation history or external records.