SQL Fiddle
ExtendsClass SQL Online
OnlineGDB
Judge0 IDE
JDoodle
Sphere Engine
replit
Online compiler for many languages, including MySQL

NovoPsych
Clinical assessment tools for psychologists, therapists and occupational therapists. Send measures by secure link and review scored results, severity bands and reports.

Which is more popular?
Based on our record, Rextester seems to be more popular. It has been mentioned 7 times since March 2021.
Website, pricing, platforms and company facts side by side.
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Rextester
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| Website | insurance.rextester.com | clientforms.app |
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In their own words, as submitted to SaaSHub.

No description of Rextester yet.
Clinical assessment tools for psychologists, therapists and occupational therapists. Send measures such as the PHQ-9, GAD-7 and DASS-21 by secure link and get scored results, severity bands and reports ready to review. The catalogue also includes DSM-5 ADHD assessments and autism screening tools....
What each product offers, as listed by its team.

No features have been listed yet.
An editorial look at what each product does well and who it suits.

No analysis of Rextester yet.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing Rextester and ClientForms.app.
ClientForms.app's answer:
Frontend: Next.js 15 (React 19), Tailwind CSS Backend: Supabase (PostgreSQL, Row-Level Security) Authentication: Clerk Payments: Stripe Hosting: Vercel (Sydney region) Database hosting: Supabase (Australian data residency)
ClientForms.app's answer:
Psychologists who assess ADHD and autism. Typically private practice, solo or small group (1-5 clinicians), currently using paper forms and spending hours on admin per assessment. They want something that works and is secure.
ClientForms.app's answer:
Neurodivergent-first design. Most digital forms just replicate paper online. ClientForms is built specifically for ADHD and autism patients - progress bars with time remaining (helps with time blindness), softer colours instead of harsh white, sticky headers so you always know where you are. The forms are designed to reduce anxiety and improve completion rates.
ClientForms.app's answer:
Most clinical software treats patients as an afterthought. ClientForms is designed specifically for neurodivergent users who are filling out the forms, progress indicators, time estimates, calmer colours, predictable layouts. One link, no signup required, works on any device. Patients just open and complete.
Share your experience with using Rextester and ClientForms.app. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

It supports around 30 languages including Java, but it is more popular among C# users. Rextester started as a Regular Expression Tester, later grew to be an online IDE.
We have no reviews of ClientForms.app yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.

My Professor has not provided any resources or material to help complete this project, I have tried to problem solve, use the internet, even chatgpt. (I can send the code that it gave me in comments if needed, but ) I need help... Source: over 3 years ago
Does it really do that? (I've just tried in rextester.com, it complains about declared but unused variables.). Source: almost 4 years ago
(A quick survey of some of the languages at rextester.com showed that they are usually counted from 1. I'd suggest doing the same would be least surprising.). Source: over 4 years ago
Tracking ClientForms.app since Dec 2025.
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