Open Tech Tools converts, protects, and shares your files in the browser.
All tools run locally on your device. No uploads for conversions, no paywalls, and no limits. The encrypted sharing tool only sends sealed, end-to-end encrypted data.
Powered by Open Tech Academy
Open Tech Tools keeps everything free because our nonprofit community sponsors the infrastructure. Explore our courses on opentechacademy.org.
- Images, PDFs, audio, text, CSV, JSON, and ZIP utilities
- End-to-end encrypted file sharing with expiration controls
- Privacy-first and ad-free
Local file toolbox
Convert and package files directly in your browser. We never upload your files for conversions, and there are no size limits enforced by Open Tech Tools.
Image Converter
PNG, JPG, WEBP, BMP, and GIF to modern image formats.
ImagesPDF Merge + Split
Combine multiple PDFs or split pages into a ZIP archive.
PDFCSV ⇄ JSON
Instant structured data conversions with clean output.
CSV · JSONText Toolkit
Clean, transform, and normalize text files in seconds.
TXT · MDAudio to WAV
Convert audio files to uncompressed WAV locally.
AudioZIP Builder
Bundle multiple files into a ZIP archive instantly.
ZIPImage Converter
Convert images locally with quality control and instant download.
PDF Merge + Split
Combine multiple PDFs or split a PDF into individual pages or ranges.
Merge PDFs
Split PDF
CSV ⇄ JSON Converter
Turn spreadsheets into JSON and back with clean, readable output.
Text Toolkit
Normalize, clean, and transform text files without uploading anything.
Audio to WAV
Convert audio files into uncompressed WAV for editing or archival.
ZIP Builder
Bundle multiple files into a single ZIP archive, fully local.
Share a file
Why Open Tech Tools exists
Open Tech Tools is part of the Open Tech Academy ecosystem. We build free, local-first tools so you never have to hand over your data just to convert a file. When you support Open Tech Academy, you help keep this toolkit open and ad-free for everyone.