Free online file tools that never see your files
Compress, convert and edit PDFs, images and HTML directly inside your browser. Nothing is uploaded, nothing is stored, nothing is watermarked. No account, no limits, no cost.
Pick a tool. It runs instantly.
Every tool below executes locally with the browser File API. Open it, drop your file, get the result — no round trip to a server.
Online Translator
Translate text between 40+ languages instantly. Two engines run in parallel so there’s always a fallback.
Use tool → Translate 📄Document Translator
Upload a .TXT, .DOCX or .SRT file and download a translated copy in the same format.
Use tool → Image 🖼Compress Image
Shrink JPG, PNG and WebP in batch with an adjustable quality slider. Download instantly.
Use tool → Image 🔄Convert Image Format
Switch between JPG, PNG, WebP and more. Batch conversion supported in a single pass.
Use tool → OCR 🔍Extract Text from Image
Read text out of screenshots and scans, then copy it or download it as a file.
Use tool → PDF 🎨PDF to Images
Export every page as an image. No page count cap, no size cap, no watermark.
Use tool → Image → PDF 📄Image to PDF
Turn one or many images into a clean, watermark-free PDF ready to download.
Use tool → PDF 📦Compress PDF
Choose your own compression level and trade size against quality exactly as you need.
Use tool → PDF 📎Merge PDF
Combine multiple PDFs into one document and reorder pages before you export.
Use tool →Straighten PDF
Auto-detect tilted scanned pages and rotate every one back level in a single click.
Use tool →PDF to Word
Rebuild a PDF as an editable .docx with headings, lists and spacing kept intact.
Use tool →Split PDF
Extract specific page ranges, cut every page into its own file, or fragment segmentation.
Use tool → HTML 💻HTML Online Editor
Write HTML with a live preview pane. Ideal for quick snippets, emails and landing tests.
Use tool → HTMLMarkdown to HTML
Output the Markdown content directly as an HTML document that can be opened in a browser.
Use tool →Compress Video
You can freely select the sizes of multiple levels to compress each video.
Use tool →Diff Checker
Quick identification of differences between two pieces of text and supports document comparison.
Use tool →JSON Formatter & Validator
Paste messy JSON, get it back readable and syntax-highlighted — or minified for shipping.
Use tool →Your tool isn’t here?
The roadmap is driven by requests. Tell us what you need and it may ship next.
Request a tool →No tool matches that search — try “pdf”, “image” or “convert”.
Privacy by architecture, not by promise
Most “free online converters” upload your file to a server you cannot inspect. Tool Lab has no upload endpoint at all — there is nothing to leak, because there is nothing to receive.
Typical online converter Server-side
- × Your document sits on someone else’s disk, even if only briefly
- × Upload and queue time scales with your file size
- × Free tiers cap file size, page count or daily usage
- × Watermarks and paywalled “Pro” features
- × Retention policy is a paragraph you have to trust
Tool Lab In-browser
- ✓ Files are read with the JavaScript File API and never transmitted
- ✓ Processing speed depends only on your own device
- ✓ Size and quantity limited only by your browser memory
- ✓ No watermark, no account, no paid tier
- ✓ Open the DevTools network tab and verify it yourself
Three steps, roughly five seconds
No tutorial, no onboarding, no settings screen. Every tool follows the same drag-and-drop pattern.
Open the tool
Click any tool above. The page loads its logic once, then works even if your connection drops.
Drop your file
Drag a file in or pick it from your device. It is loaded into the tab’s memory, not sent anywhere.
Download the result
Save the output and close the tab. The browser releases the memory and nothing remains.
Frequently asked questions
Are my files uploaded to a server?
No. Tool Lab processes every file entirely inside your browser using the JavaScript File API. There is no upload endpoint and no cloud storage behind these tools, so your documents never leave your device. You can confirm this by opening your browser’s developer tools and watching the network tab while you use any tool.
Where is my file stored after processing?
Only in the memory of the browser tab you are using, and only while that tab is open. The downloaded output is saved to your own device by your browser. Once you close or refresh the tab, the browser releases that memory and nothing is retained.
Do I need an account, and is there a file size limit?
No account, no email, no sign-up. Because processing is local, there is no server-side quota either — file size and batch quantity are limited only by the memory your browser allocates to the tab, which is typically several gigabytes on a modern desktop.
Is Tool Lab really free, and how does it stay free?
Yes, every tool is fully free with no watermark and no paid tier. Running no file servers means near-zero marginal cost per user, which is exactly what makes permanent free access sustainable.
Do the tools work offline?
Mostly. The core logic is embedded in the page script, so once a tool has loaded it keeps working without a connection. A few features that pull in external code libraries at runtime will need the network on first load.
What tools are coming next?
Tool Lab is built as an expandable directory rather than a single-category site. Image, PDF and HTML tools are live today, with video and text/data utilities planned. New tools are prioritised by what visitors actually request.
Stop uploading your documents to strangers
Nine free tools, zero uploads, zero accounts. Pick one and finish the job in your browser right now.
Browse all tools →