01Phase 01
1. Otsu Canvas Pre-Processing
Enhances image contrast and applies adaptive Otsu binarization to cleanly isolate text from uneven lighting and shadows.
Image to Speech Converter: Read Text from Pictures Aloud
Convert image and screenshot text into spoken audio in your browser. 100% private client-side OCR and speech synthesis with zero cloud uploads.
Reading Speed1.00x
Voice Pitch1.00
Sentence Pause0.40s
Canvas OCR Pre-Processor:
Source Image & OCR Visualizer
Drop image or pasteDrag & drop photo, screenshot, or book page
Or press Cmd+V to paste from clipboard
100% Local Browser OCR · Zero Server Uploads
Extracted Spoken Dialogue
OCR 96% Acc0 words·0:00 est.
Upload or paste an image on the left
Text will be extracted and converted to spoken sentences for listening
0:00/0:00
100% browser-local processing · Zero files or image bytes uploaded to any server
Technical Architecture
From pixel scan to human-paced speech audio
How our in-browser OCR engine cleans artifacts, de-hyphenates lines, and synthesizes speech.
02Phase 02
2. Browser-Local OCR & De-Hyphenation
Extracts word tokens with bounding-box coordinates directly inside your browser. De-hyphenates line wraps and strips scanning artifacts.
03Phase 03
3. Subtitle & Text Export
Audition with synchronized bimodal visual karaoke highlighting and download synchronized WebVTT, SRT subtitles, Audacity cue labels, and formatted text.
Connected finishing workflows
Explore companion utilities for document narration, PDF extraction, and loudness mastering.
Audio Standards & Research
Engineering guides & deep-dive workflows
Explore the acoustic principles, speech synthesis prosody, and document reading workflows.
Speed Changer6 min read
How to Change Audio Speed Without Making Speech Hard to Follow
Time-stretch algorithms vs tape-speed resampling: how pitch-preserving phase vocoders keep speech intelligible at varied playback speeds.
Online Audio Editor7 min read
Audio Editor Online: How to Make Clean, Reversible Speech Edits
The browser-local speech editing methodology: working in local memory, auditing splice cuts before export, and maintaining raw source masters.
Free Audio Editor7 min read
Free Audio Editor for Voice: How to Choose a Safe, Focused Workflow
A 5-point evaluation framework for voice tools: local processing privacy, reversible edits, dialogue-specific pacing controls, and uncompressed export.
Frequently asked questions
Everything you need to know about browser-local OCR and audio conversion.
How does AutoSilenceCut convert images into spoken audio?+
AutoSilenceCut combines client-side Canvas pixel pre-processing (Otsu binarization and contrast auto-leveling) with WebAssembly OCR. Once the text is extracted and de-hyphenated, the built-in speech synthesis engine turns the words into natural, studio-quality speech with prosody cushions.
Are my uploaded photos or private screenshots sent to any server?+
No. Zero image bytes, zero text snippets, and zero audio waveforms are ever uploaded. All OCR and speech synthesis execute 100% locally inside your browser memory for complete privacy.
How does this compare to Speechify and NaturalReader?+
Speechify gates camera/photo OCR reading behind a $139–$159/year subscription, and NaturalReader limits free users to 20 minutes/day with OCR restricted to paid tiers. AutoSilenceCut is 100% free with unlimited image conversions, zero signups, and lossless 16-bit WAV exports.
What image formats are supported?+
You can upload PNG, JPG/JPEG, WebP, AVIF, BMP, and TIFF files, or press Cmd+V / Ctrl+V to paste screenshots directly from your clipboard.
Workflow Mesh
Complementary OCR & Voiceover Tools
Extract text from images, documents, and web articles to create natural speech audio.
PDF Reader
Open tool→PDF to Audio Exporter
Extract text from PDF pages and export natural spoken voice masters.
Browser TTS
Open tool→Text to Speech Studio
Convert custom text and scripts into natural dialogue with speech pacing.
Tempo Control
Open tool→Audio Speed Changer
Speed up spoken image audio from 0.5x to 2.0x without pitch shift.