Developer Tools · Vendor site 2026-10-04
regex101 is an online regular expression tester, debugger, and quick reference supporting flavors such as PCRE2. The site provides live match highlighting, explanation panels, and shareable patterns for iterative regex development.
Developers and analysts who need fast regex validation with flavor-specific behavior and inline explanations.
Prices and plan limits were not confirmed from the vendor; check their site before buying.
regex101 combines live testing, flavor-aware parsing, and reference material so engineers can iterate on complex patterns without leaving the browser.
What it can do
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Title | Homepage brands the tool as an online regex tester, builder, and debugger. | Facts sourced | 2026-10-04 |
| Flavors | Initial app state defaults to PCRE2 with configurable flags in the editor UI. | Facts sourced | 2026-10-04 |
| Panels | Layout includes explanation, match info, and quick reference sidebars for active patterns. | Facts sourced | 2026-10-04 |
Understand the total cost
Free
Free
Core regex testing features are available in the browser without a published monthly USD plan on the homepage fetched here.
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regex101 is an online regular expression tester, debugger, and quick reference supporting flavors such as PCRE2. The site provides live match highlighting, explanation panels, and shareable patterns for iterative regex development.
Not confirmed. This record lists ongoing free access; check the plan limits before starting.
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Not confirmed. API access and subscription access may have different terms; consult the linked sources.
Prices and plan limits were not confirmed from the vendor; check their site before buying.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
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