Image CAPTCHA
Classic visual challenge using distorted text or image recognition before a protected action is accepted.
Quick Facts
Difficulty
Medium
Interaction
Visual recognition and text entry
Response
Typed answer
Languages
PHP / Laravel, Node.js / Express, Python / Django
Benchmark Snapshot
Services
17
Fastest Time
0.6s
Best Success
89.6%
Best Received
100.0%
Updated
Apr 25, 2026
Overview
What This CAPTCHA Is
Image CAPTCHA is one of the most widely recognized captcha formats. It asks the user to interpret or identify visual content before a protected request is processed.
Key Points
- Store answers server-side.
- Expire challenges quickly.
- Prevent token reuse.
Common Use Cases
- Signup forms
- Login protection
- Contact forms
Common Failure Modes
- Embedding the answer in client-side code.
- Allowing unlimited challenge retries.
How This CAPTCHA Is Solved
Generate a challenge server-side, render the image or prompt, collect the user response, and validate it securely on the backend.
- Create the challenge and expected answer on the server.
- Render the image challenge to the user.
- Submit the challenge token and answer with the form.
- Validate the answer and reject expired or reused tokens.
How to Add This CAPTCHA to Your Website
Render the challenge image, store the expected answer server-side, and validate the submitted answer on the backend.
Official integration docs →Supported Solvers Benchmark
Showing captcha-specific benchmark data when available, otherwise the latest overall solver benchmark.
| Solver | Score | Avg Time | Success | Received | |
|---|---|---|---|---|---|
CaptchaAI
|
9.8 | 9.7s | 90% | 100% | View → |
2Captcha
|
9.6 | 15.0s | 63% | 100% | View → |
Anti-Captcha
|
9.2 | 10.3s | 88% | 100% | View → |
CapMonster Cloud
|
9.0 | 10.8s | 87% | 100% | View → |
CapSolver
|
8.7 | 12.3s | 83% | 100% | View → |
SolveCaptcha
|
8.5 | 14.6s | 63% | 100% | View → |
NextCaptcha
|
7.5 | 14.1s | 82% | 96% | View → |
NoCaptchaAI
|
7.2 | 14.6s | 76% | 99% | View → |
DeathByCaptcha
|
7.2 | 0.6s | 0% | 100% | View → |
Cap.Guru
|
7.0 | 15.5s | 74% | 97% | View → |
AZCaptcha
|
6.8 | 15.9s | 73% | 96% | View → |
9kw.eu
|
6.5 | 17.4s | 69% | 92% | View → |
Captchas.io
|
6.5 | 16.1s | 72% | 95% | View → |
CaptchaSonic
|
6.2 | 16.3s | 71% | 95% | View → |
TrueCaptcha
|
6.0 | 19.8s | 64% | 86% | View → |
EndCaptcha
|
5.8 | 19.4s | 64% | 87% | View → |
CheapCaptcha
|
5.5 | 20.0s | 62% | 86% | View → |
FAQ
Should validation happen on the frontend?
No. Validation should happen on the backend so the expected answer is not exposed.
Related Captcha Types
Performance depends on image clarity, distortion level, answer normalization, and expiry rules.