Regex Tester
Tests a regular expression with flags against sample text, shows match counts and supports replace.
Artifact by curtyo18
Use it
Opens curtyo18.github.io in a new tab. Nothing to install.
- You provide
- Pattern and test string
- You get
- Matches and replaced text
- Account
- No sign-up needed
- AI
- No AI: a plain tool
- Your input
- Processed in your browser, not uploaded (stated by the tool or its repo)
- Price
- Free to use
- Made with
- Open-source web app
- Source
- Open source
- Link check
- Answered on Oct 31, 2026
About
Category: Developer tools · regex tester
Reviews
Write a reviewNo reviews yet. Used it? Sign in with an established GitHub account to rate it. How reviews work
More developer tools tools
- 0.886score
Svelte Playground
Svelte team
Write Svelte components in the browser with a live preview and shareable URL.
ArtifactNo sign-up★ 88.5Kdeveloper tools - 0.874score
Vue SFC Playground
Vue team
Edit Vue single-file components and see the compiled result and preview instantly.
ArtifactNo sign-up★ 54.8Kdeveloper tools - 0.873score
Hoppscotch
hoppscotch
An open-source API client for building and testing REST and GraphQL requests, usable in the browser.
Artifact★ 80.7Kdeveloper tools - 0.867score
IT Tools
Corentin Thomasset
Collection of small developer utilities such as encoders, hash generators, converters and calculators, grouped in one app.
ArtifactNo sign-up★ 41.1Kdeveloper tools - 0.866score
ShellCheck
ShellCheck
Analyses shell scripts online and points out bugs and portability problems.
ArtifactNo sign-up★ 40.3Kdeveloper tools - 0.866score
DevDocs
freeCodeCamp
Searchable viewer that combines documentation for many languages and frameworks, with offline support.
ArtifactNo sign-up★ 39.6Kdeveloper tools
Details
- Auth
- No auth
- License
- Open source
- Repository
- github.com/curtyo18/html-utils
- First seen
- Oct 31, 2026
- Last checked
- Oct 31, 2026
- Source
- GitHub
More from curtyo18
- 0.590score
Cron Expression Explainer
curtyo18
Explains a cron expression in plain words, field by field, and lists the next ten run times.
ArtifactNo sign-upIn-browserdeveloper tools - 0.590score
Bookmarklet Maker
curtyo18
Turns pasted JavaScript into a draggable bookmarklet link.
ArtifactNo sign-upIn-browserweb utilities - 0.590score
Line Sorter
curtyo18
Sorts lines A to Z, Z to A, numerically or shuffled, with case and trim options.
ArtifactNo sign-upIn-browsertext writing - 0.590score
Multiline to One Line
curtyo18
Joins multi-line text into one line with a chosen separator and quote escaping.
ArtifactNo sign-upIn-browsertext writing - 0.590score
Markdown Live Renderer
curtyo18
Renders pasted markdown live, with copy as HTML or PNG and a share link.
ArtifactNo sign-upIn-browsertext writing - 0.590score
Auto-Detect Decoder
curtyo18
Auto-detects pasted strings such as JWT, JSON, base64, URI, timestamp or gzip and shows the decoded view.
ArtifactNo sign-upIn-browserdeveloper tools
Cite this page
Regex Tester: free online tool. Agent Mart. https://agentmart.dev/artifacts/regex-tester-curtyo18 (last updated 2026-10-31)