toolboxlib – free browser tools for PDF, images & text
A growing collection of fast everyday utilities. Everything runs locally in your browser — no server ever sees your files. Our tools run entirely client-side. All tools are free.
Why local browser tools are better for private files
toolboxlib is built for everyday tasks where sensitive files or inputs should not be sent across the internet unnecessarily. PDF documents, images, text, passwords, JSON data and calculations are processed directly in your browser. Modern browsers provide powerful local APIs, so many useful tasks no longer require a cloud server.
The biggest advantage over traditional cloud tools is data minimization: when a file is not uploaded, it cannot be stored, scanned or accidentally shared on a server. This saves time, avoids upload queues and gives you more control over contracts, invoices, photos, code snippets and other personal content.
Privacy, no uploads and supported browsers
All tools are free and run client-side. That means the actual processing happens on your own device. File tools open selected files only in the browser's local memory; text, developer and calculator tools process the input directly inside the tab. No account is required.
The tools work in current versions of Chrome, Edge, Firefox and Safari on desktop and many mobile devices. For very large files, speed depends on your device and available memory. Because no uploads are required, workflows stay simple and private even for confidential documents.
PDF Tools
All PDF tools run locally in your browser. No uploads, no servers, no signup – your files stay private.
- PDF merger
Combine multiple PDFs into one file – right in your browser, no upload. - PDF splitter
Split PDFs into single pages or extract a page range as a new PDF – locally in your browser. - PDF rotator
Rotate all pages of a PDF by 90°, 180° or 270° – locally in your browser, no upload. - PDF page reorderer
Drag-and-drop reorder the pages of a PDF – locally in your browser, no upload. - PDF page remover
Remove individual pages from a PDF – pick them from a preview and save the trimmed PDF locally. - PDF compressor
Shrink PDF files — choose quality and resolution, all locally in your browser.
Image Tools
All image tools work 100% in your browser. Your photos are never uploaded.
- Image compressor
Shrink JPG/PNG – quality-optimized, processed locally in your browser. - Image cropper
Crop images with drag-and-drop handles and aspect ratios – locally in your browser. - Image converter
Convert images between JPG, PNG and WebP – locally in your browser, no upload. - Image metadata editor
View, edit or fully strip EXIF metadata from images – locally in your browser. - Image to PDF converter
Combine multiple JPG or PNG images into a single PDF – locally in your browser, no upload. - Image resizer
Change image resolution – freely set width and height, optionally lock aspect ratio. All locally in your browser. - Image rotator & flipper
Rotate images by 90/180/270° and flip horizontally or vertically – directly in your browser, no upload. - Color converter
Convert HEX to RGB and back – with live preview and CSS output. Right in your browser.
Text Tools
Quick text helpers – fully private in your browser.
- Text counter
Words, characters and reading time – instant and private. - Markdown editor
Edit markdown with live preview and download as HTML or Markdown – all locally in your browser. - Regex tester
Test regular expressions live, view matches and replace text – all locally in your browser. - Text case converter
Convert text to UPPERCASE, lowercase or Title Case – locally in your browser. - Diff checker
Compare two texts and highlight differences line by line – locally in your browser, no upload.
Security Tools
Cryptographically secure tools – fully offline in your browser.
Developer & IoT Tools
Tools for developers and IoT tinkerers – fast, private, no login.
- HEX / Base64 decoder
Convert HEX values or Base64 strings into readable text (ASCII/UTF-8) – entirely in your browser. - JSON formatter
Validate JSON, highlight errors and pretty-print it – locally in your browser. - Cron expression tester
Validate cron expressions and preview the next scheduled runs – locally in your browser. - QR code generator
Convert URLs or WiFi credentials into QR codes – directly in your browser, no upload. - Unix timestamp converter
Convert Unix timestamps to local time and vice versa – directly in your browser.
Calculators
Practical calculators – instant and private in your browser.
Audio Tools
All audio tools run locally in your browser. No uploads, no servers – your files stay private.
Frequently asked questions
Are my files uploaded to toolboxlib?
No. File tools process selected files locally in your browser. No server sees the contents of your files.
Are the online tools free?
Yes. Every tool on toolboxlib is free to use and requires no registration.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox and Safari are supported. For very large files, your device performance matters.