# What does JSFiddle use?

JSFiddle (jsfiddle.net) shows public evidence of 12 tools, according to runsonwhat (last checked 2026-10-20).

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Website code |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Vue.js](https://www.runsonwhat.com/reverse/vue) | Frontend | Website code |  |
| [Stripe](https://www.runsonwhat.com/reverse/stripe) | Payments & Billing | Custom domain, DNS verification records, Website code |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [updown.io](https://www.runsonwhat.com/reverse/updown) | Monitoring | Custom domain |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [GitBook](https://www.runsonwhat.com/reverse/gitbook) | Support & Docs | Custom domain |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | DNS verification records, Email records |  |
| [Let's Encrypt](https://www.runsonwhat.com/reverse/letsencrypt) | Security & Compliance | DNS records |  |
| [Sectigo](https://www.runsonwhat.com/reverse/sectigo) | Security & Compliance | DNS records |  |
| [DigiCert](https://www.runsonwhat.com/reverse/digicert) | Security & Compliance | DNS records |  |
| [Google Trust Services](https://www.runsonwhat.com/reverse/google-trust) | Security & Compliance | DNS records |  |
| [iCloud Mail](https://www.runsonwhat.com/reverse/icloud-mail) | Workspace | DNS verification records, Email records |  |

## FAQ

### What tools does JSFiddle use?

As of October 2026, runsonwhat has found 12 tools at JSFiddle (jsfiddle.net) in public records. Edge & Hosting: Cloudflare. Application: Vue.js and Stripe. Data & Observability: updown.io. Go-to-market: GitBook. Company Ops: Google Workspace, Let's Encrypt and Sectigo. Last checked October 20, 2026.

### What email provider does JSFiddle use?

JSFiddle uses Google Workspace for email and office software, alongside iCloud Mail, according to runsonwhat (October 2026). runsonwhat found Google Workspace through a DNS verification record for Google Workspace and email records. Google Workspace is used by 405,361 companies runsonwhat tracks.

### What does JSFiddle use for customer support?

JSFiddle uses GitBook for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found GitBook through a subdomain that points at GitBook. GitBook is used by 2,032 companies runsonwhat tracks.

### What payment provider does JSFiddle use?

JSFiddle uses Stripe for payments and billing, according to runsonwhat (October 2026). runsonwhat found Stripe through a subdomain that points at Stripe and a DNS verification record. Stripe is used by 29,228 companies runsonwhat tracks.

### What monitoring tools does JSFiddle use?

JSFiddle uses updown.io for monitoring, according to runsonwhat (October 2026). runsonwhat found updown.io through a subdomain that points at updown.io. updown.io is used by 156 companies runsonwhat tracks.

### Does JSFiddle use Cloudflare?

Yes. runsonwhat found Cloudflare at JSFiddle through DNS records that point at Cloudflare and code on jsfiddle.net. Cloudflare is a CDN & Edge tool used by 707,967 companies runsonwhat tracks.

### Which companies have a tech stack similar to JSFiddle's?

The companies with the stacks most like JSFiddle's are LetsCast.fm, Delivereasy, Authgear and SCM SIM, according to runsonwhat (October 2026). Each shares 2 to 5 tools with JSFiddle, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what JSFiddle uses?

runsonwhat reads public records only. Of the 12 tools at JSFiddle, 8 were found through DNS records, 3 through subdomains that point at the vendor and 1 through code on jsfiddle.net. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and jsfiddle.net about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/jsfiddle.net (updated October 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.