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S21 Transcriber

Turn spoken evidence into searchable intelligence.

S21 Transcriber helps investigators convert interviews, calls, recordings and video evidence into clear, searchable transcripts. It reduces manual listening time, helps teams find key moments faster, and supports structured review and reporting - fully offline for sensitive investigative environments.
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The Problem

Replaying hours of recordings creates delay, fatigue and pressure.

Investigators often have to work through interviews, calls, body-worn video and other recordings by listening from start to finish, making it harder to find the moments that matter quickly and consistently.
Transcribe, search, prepare

What S21 Transcriber helps investigators do

Transcribe audio and video evidence

Convert interviews, calls, recordings and video files into structured transcripts for review.

Search spoken content quickly

Find names, phrases, locations, events and key terms without replaying entire recordings.

Move between transcript and media

Jump from transcript text back to the source audio or video to check context and accuracy.

Separate speakers clearly

Support clearer review and reporting by distinguishing between speakers where applicable.

Flag and prepare key material

Mark important sections, edit transcripts and prepare content for reporting or case-building.
See how it works in 5 minutes

Join a former law enforcement officer for a practical walkthrough of the tool and features designed to support real-world investigations

We’re creating an open community of collaboration with other industry experts​

S21 VisionX fully supports evidential data exchange with leading digital forensic tools, ensuring seamless integration with your existing workflow. Compatible platforms include X-Ways Forensics, Cellebrite, Magnet Forensics (AXIOM, IEF, Witness), GrayShift, Griffeye, Belkasoft X, Oxygen Forensics, OpenText EnCase, MSAB XRY and XAMN, Exterro, GetData, and many others. With S21 VisionX, you can review, categorise and identify victims efficiently — and easily export results back to your tool of choice for further analysis or reporting.
The solution

Turn spoken evidence into searchable transcripts

S21 Transcriber makes it easy to turn interview recordings, phone calls, and video evidence into clear, reliable transcripts — no cloud, no data risk.

Whether it’s US/UK English or multi-language recordings, S21 Transcriber delivers fast, accurate results with speaker separation, advanced search, and intuitive editing.
  • Fully offline — no servers, no leaks
  • Built for law enforcement and major crime investigations
  • Instant transcripts with no setup or training needed

See how Transcriber turns spoken evidence into searchable intelligence

S21 Transcriber helps investigators convert audio and video into searchable transcripts, reducing manual listening time and supporting faster review, reporting, and investigative understanding.
How it works

From recordings to focused review

S21 Transcriber helps investigators move from long recordings to focused review by turning spoken evidence into clear, searchable transcripts. Teams can find key words, phrases and relevant sections faster, check them against the original audio or video, and prepare the material needed for reporting or case review.

Import spoken evidence

Add interviews, calls, recordings, body-worn video, phone footage or other audio and video material.

Generate searchable transcripts

Convert spoken content into structured text that can be searched, reviewed and edited.

Find and check key moments

Search for words, phrases, names or sections, then jump back to the source media to confirm context.

Prepare material for review

Tag, edit and export relevant transcript sections for reporting, case preparation or wider review.
Features

Core transcription and review features

Cases created in just a few clicks

Create a new case in just a few clicks with the easy-to-use case setup. Simply add the media, fill in the case details and select the number of speakers. Then let S21 Transcriber do the rest.

Edit speaker names with ease

Quickly update and manage speaker names within your transcripts to keep records accurate and organised. This will also ensure clarity in conversations, making it easier to follow dialogue and reference key individuals throughout your case.

Search and flag transcript lines

Easily search through transcripts to find specific words, phrases or topics, then flag important lines for quick reference, helping you highlight key evidence, streamline reviews and keep critical details organised within your case.

Generate reports

Create clear, professional reports from your transcripts in just a few clicks. Export flagged lines, speaker details, and full conversations into a structured document that can be shared, reviewed, or submitted as part of your case evidence.

Support multi-language and varied media formats

Use AI to detect and blur all visible faces in your footage instantly — or isolate and keep one or more specific subjects visible. Ideal for redacting bystanders, safeguarding victims, or preparing footage for public release and legal disclosure. Fully auditable and frame-accurate.

Flexible media support

Enhance video and image evidence with AI: improve colour, contrast, and lighting; remove glare or shadows; sharpen blurry footage; deblur vehicle plates; upscale low-resolution faces; recolour greyscale footage; and restore detail in compressed or degraded files.

Simple editing tools

Enhance video and image evidence with AI: improve colour, contrast, and lighting; remove glare or shadows; sharpen blurry footage; deblur vehicle plates; upscale low-resolution faces; recolour greyscale footage; and restore detail in compressed or degraded files.

Designed for sensitive investigations

Enhance video and image evidence with AI: improve colour, contrast, and lighting; remove glare or shadows; sharpen blurry footage; deblur vehicle plates; upscale low-resolution faces; recolour greyscale footage; and restore detail in compressed or degraded files.
Evidence Sources

Works with the spoken evidence investigators receive

S21 Transcriber supports the review of spoken evidence from a wide range of audio and video sources - including interviews, calls, body-worn video, dashcam footage, smartphone recordings, digital camera footage, and social media exports.

Interviews

Phone calls

Covert recordings

Body-worn video

Dashcam footage

Mobile phone video

CCTV with audio

Doorbell camera recordings

Online and social media video

Computer-stored audio & video files

Used in investigations where speed and accuracy matter

S21 supports evidential data exchange with leading digital forensic tools, integrating seamlessly with existing workflows. Investigators can review, categorise and identify victims efficiently, then export results back to their preferred tools for further analysis or reporting.

Real investigations. Real impact.

See how investigative teams are using Vision X to analyse evidence, identify connections, and progress complex cases.
View all case studies
S21 Transcriber

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