AI mock interviews with real-time voice feedback.
Upload your resume and the job description, talk to an AI interviewer out loud, and get a scored four-axis coaching report you can actually act on. Free — no credit card, no install.
- Voice-first, browser-native
- Resume + JD aware follow-ups
- Scored rubric + share link
Sign in with Google to start — sessions sync across devices.
What InterviewLab does
Three pieces, designed to fit together.
Voice-driven mock interview
You talk, the AI talks back. No typing, no chat window — interviews are oral conversations and InterviewLab treats them that way. Pick a voice (alloy, onyx, nova, echo, shimmer), choose a difficulty, and you are in.
Real-time follow-ups
The interviewer reads your resume and the JD before the session, then asks follow-up questions based on what you actually say. Skip a topic, hand-wave a concept, or contradict yourself — it will notice and probe.
Scored coaching report
After the session you get a 0–10 score across four axes, a hire/no-hire verdict, per-question coaching, an ideal-answer summary, and a study plan. Share the report via a public link with a coach or peer.
How it works
Five steps from upload to actionable feedback.
- 01
Upload your resume + JD
PDF or paste-as-text. The interviewer needs both to ask questions that match the role. You can save common docs to your library and reuse them across sessions.
- 02
Click start, talk out loud
The interviewer greets you and asks the first question. You answer with your voice. No teleprompter, no chat — this is closer to the real thing than any text-based prep tool.
- 03
Get follow-ups based on what you said
The model listens for hand-waves, contradictions, and missing trade-offs and pushes you on them. If your answer was solid, it moves on. If not, expect three follow-ups in a row.
- 04
End the session, get a scored report
When you click End, you get an overall score, a verdict, four-axis ratings (technical depth, system design, communication, role fit), per-question coaching, and a study plan.
- 05
Iterate — retake or share
Hit Retake to run the same session again and watch your score climb. Or flip the share toggle and send a public link to a coach, a peer, or your hiring buddy.
Who it is for
Three of the most common reasons people show up.
Software engineers prepping for big-tech loops
Five-round loops with system design, DSA, and behavioral mixed in. Run one of each in InterviewLab the week before, take the report into a study session, and walk into the real loop knowing where you actually stand.
Pivoting into a new role or domain
Going from data engineer to ML engineer? From IC to EM? The interviewer reads your new target JD, not your old job title, so the questions push you toward the role you are interviewing for, not the one you already had.
Non-native English speakers building interview confidence
Communication clarity is its own scored axis. Run sessions until your answers come out the way you want them to — under timer pressure, in a real conversation, with measurable feedback.
Question types covered
The interviewer is steered by the JD, but it knows the standard genres.
Technical depth
- Data structures & algorithms
- Language deep-dives (Go, Rust, TS, Python)
- Debugging walk-throughs
- Concurrency & memory model
System design
- Design a URL shortener
- Rate limiter for an API gateway
- Newsfeed ranking pipeline
- Hot-key handling at scale
Behavioral
- Tell me about a time you disagreed with a senior engineer
- A project that slipped — what did you do
- Hardest tradeoff you made
- How you gave hard feedback
Role-fit & negotiation
- Why this team, why now
- Most surprising thing about the JD
- What would your first 90 days look like
- Salary expectations and counters
What is in the coaching report
Not a vibe-check — a structured rubric you can study from.
Live reports use the actual radar component on the report page.
- Technical depth
How well you reason about correctness, complexity, and trade-offs in your domain.
- System design
How well you scope a problem, propose a baseline, and discuss scaling, failure modes, and operational concerns.
- Communication
How clearly you explain your thought process, structure your answers, and recover when stuck.
- Role fit
How well your experience and motivation map to the specific JD you uploaded.
For every answer you gave, the report shows what was good, what was missed, and a one-paragraph summary of the ideal answer. Your best and worst answers are flagged so you know what to repeat and what to fix.
Privacy & data
What InterviewLab stores, where it lives, and what you control.
What we store
- Your resume and JD text (so you can reuse them across sessions).
- The transcript of each session (so the report can cite what you said).
- The generated feedback report.
- Your Google account email for sign-in.
Your controls
- Delete any session from the dashboard.
- Delete any document from the document library.
- Sessions are private by default — only you can see them.
- The public share link can be toggled off any time, which immediately revokes access for the public URL.
Audio is transcribed in-flight and is not retained as a recording — only the text transcript persists. Data is stored on Codersera-managed infrastructure, not handed to advertising partners.
How it compares
Honest tradeoffs vs the options most people consider.
| Tool | Voice | Follow-ups | Rubric | Share | Cost |
|---|---|---|---|---|---|
| InterviewLab | Yes | Yes — JD-aware | Four axes + verdict | Public link | Free, unlimited |
| ChatGPT (as interviewer) | Limited | Generic | None | Copy / paste | Free / $20 mo |
| Pramp | Yes (peer) | Depends on partner | Peer rating | Manual | ~5 free credits / mo |
| Final Round AI | Yes | Yes | Score + feedback | Internal only | ~$500 / year |
| interviewing.io | Yes (human) | Yes | Detailed (human) | Yes | Paid / gated |
Pricing snapshots reflect listed plans as of 2026 — paid tools change tiers frequently. See the full free-tier roundup for details.
FAQ
If your question is not here, contact us.
Is InterviewLab really free?+
Yes. The full mock interview, the scored coaching report, and the share link are free. Sign in with Google so we can save your sessions across devices — that is the only requirement.
Do I need to install anything?+
No. InterviewLab runs in your browser. The only permissions it asks for are microphone (always) and camera (optional, off by default).
Which interview types does it support?+
Technical (DSA, language deep-dives, debugging), system design, behavioral, role-fit, and mixed sessions tuned to a specific job description.
How long is a typical session?+
You set the target duration and question count when you start. Most users run 20–30 minute sessions with 5–8 questions; 60-minute deep dives are supported.
What does the scoring rubric measure?+
Four axes: technical depth, system design, communication clarity, and role fit. Each is scored 0–10 with written evidence and gaps. There is also an overall score and a verdict (strong-hire, hire, no-hire, strong-no-hire).
Can I share my session report with a coach or peer?+
Yes. From any completed session you can flip the share toggle to generate a public link (`/tools/interviewlab/r/<slug>`). Anyone with the link can view the report and transcript without signing in. Toggle it off any time to revoke.
How is this different from practising with ChatGPT?+
ChatGPT is text-first, has no notion of an interview clock, and will not push back on a weak answer. InterviewLab is voice-first, runs against a real resume + JD, asks follow-ups, manages time, and produces a structured rubric you can act on.
How is my data handled?+
Your resume, JD, transcripts, and feedback are stored on Codersera servers tied to your Google account so you can return to them. You can delete any session or document from the dashboard at any time. Sessions are private by default — only you can see them unless you explicitly enable the public share link.
Does it work for non-engineering roles?+
Yes. The interviewer reads the JD you upload, so product managers, designers, data scientists, and SDETs all get role-appropriate questions. Engineering interviews are the most battle-tested.
Is this useful for ESL speakers practising English fluency?+
Very. The interviewer speaks at a natural pace, the report calls out communication clarity as its own axis, and you can retake sessions until you sound the way you want.
Can I retake the same interview?+
Yes. Each session has a Retake button that reuses the same role, JD, and resume so you can compare scores across attempts.
What happens if my mic cuts out mid-answer?+
You can rejoin a live session from the dashboard — sessions stay open until you end them. If a turn was cut off, the next answer continues the conversation; the report is generated only when you end the session.
Keep reading
Background on the rubric, plus how the free-tier landscape stacks up.
How InterviewLab works under the hood
How the rubric is calculated, how follow-ups are generated, and the workflow we recommend the week before a real interview.
Read the article RoundupBest free AI mock interview platforms in 2026
Honest comparison of free-tier options including ChatGPT, Pramp, Final Round AI, interviewing.io, and InterviewLab.
Read the articleTry a free mock interview now
Twenty minutes from now you could have a scored coaching report telling you exactly what to fix before your real interview.
