cnvrt.to • 100% Client-Side WASM Pipeline

Convert Files Online Free.
Fast, 100% Private & In Browser.

Free client-side file converter for PDF, images, video, audio, and documents. Zero server uploads, instant batch processing, and 100% confidential in local RAM.

Drop files here for instant RAM conversion

Or click to select files. 100% private, executed locally in browser WebAssembly.

0 Cloud Egress WebAssembly V8 Parallel Batch
Popular Online Converters (HEIC, PDF, Audio & Data)
HEIC → JPGPDF → WordMP4 → MP3PNG → WebPCSV → ExcelJPG → PNGExcel → CSVPNG → Favicon
Dedicated Converter Tools

Free Online File Converter Tools: Merge PDF, HEIC to JPG & Video to MP3

Everything executes 100% inside your browser memory. Zero queues, zero file limits, and 100% private.

PDF Engine (ISO 32000-2)Launch Merger

Merge PDF Documents in Local RAM

Concatenate multiple PDF streams into an optimized single document with instant client-side page rendering and re-ordering.

Interactive Live Preview:0ms Latency
1
dataset_q1.pdf
2
benchmark_final.pdf
3
rfc_spec_2026.pdf
Apple Photos WASM

HEIC to JPG Converter

Decode Apple iOS HEIC/HEIF camera photos into standard JPEG without compression artifacts.

Quantization Quality:85%
CompressedLossless
Convert HEIC
Vector Geometry

Rotate & Split PDF

Extract page ranges or apply matrix 90° orientation transformations instantly.

0°
Hardware Audio TranscoderOpen Extractor

One-Click Video to MP3 Audio Extractor

Demux audio streams from MP4, WebM, and MOV containers directly on your CPU using browser Web Audio codecs.

4k_stream_capture.mp4

Transcodes to 320kbps MP3 / WAV

100% Private In-Browser Converter

Private File Converter: Zero Server Uploads & 100% Data Confidentiality

Standard file converters upload your sensitive documents, financial models, and photos to remote cloud servers. cnvrt.to converts all files directly in your web browser with zero server uploads and zero data retention.

  • 0.00 KB payload: No cloud compute, no server logs, 0 telemetry.
  • Air-gap capable: Disconnect WiFi and the converter continues to run.
  • V8 Sandbox: Execution isolated from operating system risk.
cnvrt::telemetry_guard
Active Guard
Network Egress Payload:0.00 KB
Remote Cloud Transmissions:0 Requests
Execution Runtime:Client WASM (SIMD)
Memory Sandboxing:Isolated V8 Heap
Local RAM only Offline Capable

0ms Network Latency

No uploading or downloading file payloads over network pipes. Transcoding starts immediately inside local V8 memory.

0 Server Retention

Medical scans, financial spreadsheets, raw camera files, and legal contracts never touch any remote cloud server.

Multi-File Batch Queue

Process unlimited files in parallel and download all completed assets packed directly into a single compressed ZIP archive.

Hardware-Accelerated WASM

Compiled Rust, C++, and WebAssembly modules run with direct multithreaded SIMD instructions on your local CPU.