Universal Converter
Convert video, audio, and image files between popular formats with local browser processing.
Video, audio, imagesPrivate conversionNo signup
Free tools that work in your browser
Simple file tools for everyday jobs.
Convert videos, compress images, merge PDFs, count words, format JSON, and handle quick fixes without installing an app or creating an account.
Free
no account needed
42
helpful tools
Private
files stay on your device when supported
No sign-upStart using the tools right away.
Easy to usePick a tool, add your file or text, download or copy the result.
Made for privacyMany tools work directly in your browser.
Quick converters
Convert from one format to another
Choose the exact conversion you need, then add your file and download the new version.
Popular tools
Common tasks, ready when you need them
Resize an image, trim a video, clean up text, format code, or combine documents in a few clicks.
Convert Images
Convert JPG, PNG, WebP, GIF, BMP, and browser-supported image files locally with canvas export.
JPG/PNG/WebPQuality controlNo upload
Compress Image
Shrink photos and graphics with adjustable quality, dimensions, and WebP/JPG output.
Smaller imagesResize optionalInstant preview
Resize Image
Resize images to exact pixel dimensions or scale by percentage while preserving aspect ratio.
Exact pixelsScale percentAspect lock
Word Counter
Count words, characters, sentences, paragraphs, reading time, and keyword frequency instantly.
Reading timeKeyword frequencyPrivate text
Case Converter
Convert text between uppercase, lowercase, title case, sentence case, camelCase, snake_case, and kebab-case.
7 case modesOne click copyNo upload
JSON Formatter
Format, validate, minify, and inspect JSON in your browser.
Validate JSONPretty printMinify
Base64 Encoder
Encode and decode Base64 text instantly with browser-only processing.
Encode/decodeUTF-8 safePrivate
Password Generator
Generate strong random passwords locally with length, symbol, number, and casing controls.
Secure randomCustom lengthNo server
Trim Video
Cut MP4, WebM, MOV, and other video files to exact start and end timestamps.
Precise timestampsLocal enginePreview before export
Compress Video
Reduce video file size with quality presets, bitrate controls, and resolution limits.
Smaller filesQuality controlsMP4 output
Merge Videos
Join multiple video clips into one file and reorder them before exporting.
Drag reorderBatch inputStream copy
Video to GIF
Turn short video clips into looping GIFs with quality and timing controls.
Looping GIFsClip selectionSocial-ready output
Remove Audio
Strip sound from a video or replace it with a silent compatibility track.
Silent videoFast exportNo upload
Extract Audio
Extract audio tracks from video files and save them as MP3, WAV, or AAC.
MP4 to MP3High bitrateLocal extraction
Merge PDFs
Combine several PDFs into one document with drag-to-reorder controls.
Reorder pagesLocal PDF engineNo upload
Split PDF
Extract page ranges or split a PDF into smaller documents.
Page rangesBatch outputPrivate PDF splitting
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All tools
Convert tools
Video tools
PDF tools
Developer tools
Security tools
Why it feels fast
Less waiting, fewer steps, more control.
Many file tools make you upload first, wait in a queue, or create an account before you can finish. OpenToolbox keeps the common jobs straightforward: open the tool, make your change, and save the result.
For supported file tools, the work happens in your browser. That means private files can stay on your device, and you can get quick results without handing them to another service.
Updates
Latest from our blog
Why Local Browser Processing is the Future of File Tools
Learn why uploading your files to third-party servers is a security risk and how WebAssembly is changing the game for file conversion.
How to Compress Video Without Losing Quality
A comprehensive guide to understanding video compression, bitrates, and how to reduce file sizes for email and social media.
The Best Free Tools to Merge PDF Files Online Safely
Discover the safest and most efficient ways to combine multiple PDF documents into a single file without compromising your privacy.
Questions
Good to know
Do my files leave my device?
For supported tools, no. Your browser does the work on your device, so your files do not need to be uploaded to our servers.
Do I need an account?
No. You can open a tool, choose a file or paste text, and get your result without creating an account.
Will my finished file have a watermark?
No. Exported files are not watermarked.