PDF tools that never upload your files
Merge, split, organise, compress, rotate and convert. Free and unlimited, because there is no server for your documents to travel to — the work happens in the tab you already have open.
- No upload step at all — open your network tab and watch it work
- Keeps working offline, once the page has loaded
- No account, no watermark, no daily or size limit
Fourteen tools · one tab · nothing leaves your device
- Merge PDF files
- Split PDF files
- Delete, reorder and rotate PDF pages
- Edit PDF files
- Compress PDF files
- Convert PDF to images
- Convert images to PDF
- Rotate PDF pages
- Extract text from an image
- Turn text into a PDF document
- Extract text from a PDF
- Add page numbers to a PDF
- Add a watermark to a PDF
- Crop a PDF
Pick a tool
Merge PDF files
Combine several PDFs into one file, in the order you choose.
Split PDF files
Break one PDF into separate files, or pull out only the pages you need.
Delete, reorder and rotate PDF pages
Delete, reorder, rotate and duplicate pages in a visual grid.
Edit PDF files
Add text, a signature, white-out, a watermark or page numbers.
Compress PDF files
Cut file size for email and upload limits — three levels of compression.
Convert PDF to images
Export every page as a PNG or JPG, delivered as a ZIP.
Convert images to PDF
Turn JPG, PNG or WEBP images into a single PDF document.
Rotate PDF pages
Fix sideways or upside-down scans, for all pages or a few.
Extract text from an image
Read the words out of a photo or a screenshot, without retyping them.
Turn text into a PDF document
Type or paste a page and get it back as a laid-out document, not a text dump.
Extract text from a PDF
Pull the words out of a PDF as text you can copy — no upload, no account.
Add page numbers to a PDF
Number every page, in the corner you choose and the format you choose.
Add a watermark to a PDF
Stamp DRAFT, CONFIDENTIAL or your own words across every page.
Crop a PDF
Cut the white margins off a scan, or keep only the part of the page that matters.
Why this is different
Most free PDF sites upload your file to a server, process it there and delete it later. That means waiting for an upload, trusting a stranger with a contract or a payslip, and hoping the deletion promise is true. Here the file never leaves the tab it was opened in. You can load the page, go offline, and everything still works.
It is also why these tools are free with no daily quota: there is no server to pay for. No GPU, no cloud bills, and no ad-funded limit on how many documents you may process.
What that means in practice
| Server-based tools | Heron PDF | |
|---|---|---|
| Your file | Uploaded to a server, deleted later | Never leaves your device |
| Waiting | Upload, queue, process, download | Processing starts immediately |
| Offline | Impossible | Works after the page loads |
| Daily quota | Usually capped on the free tier | No limit |
| Watermarks | Common on free tiers | None |
| Very large files | Handled server-side | Limited by your device memory |
Guides
How to reduce a PDF file size
Why PDFs get big, and five ways to make one small enough to send.
How to tell whether a PDF tool uploads your file
Most online PDF tools send your file to a server. Here is the two-minute test that tells you which ones do.
How to compress a PDF to an exact size
Compress a PDF to 100 KB, 500 KB or 2 MB — and what to do when it will not go that low.
How to merge PDF files on iPhone, Android and Windows
How to combine PDFs on a phone, tablet or desktop — without an app.
How to sign a PDF without printing it
Sign a PDF on a phone or laptop without printing it — and what that signature actually proves.
How to delete a page from a PDF
Remove a page or a whole section — and what else changes when it goes.
How to convert JPG images to PDF
Turn photos or screenshots into one PDF document — and what sets the page size.
How to split a PDF into separate files
Break one document into separate files, or pull out only the pages you need.
How to convert PDF pages to JPG images
Export pages as images — which resolution to pick, and PNG or JPG.
How to rotate a PDF page permanently
Fix a sideways scan for good — why the rotation survives every viewer.
How to extract text from a PDF
Get the words out of a PDF, and know which PDFs have words to get.
How to copy text from a picture
When recognition helps, when it hurts, and how to take the picture.
How to convert text to a PDF
Turn a block of text into a properly laid-out document — without a word processor.
Sinhala and Tamil OCR, without uploading the page
Read a Sinhala or Tamil page without handing it to anyone — and what really decides whether it works.
How to add page numbers to a PDF
Number a PDF in the corner and format you choose — and the mistakes that make numbering look wrong.
How to add a watermark to a PDF
Watermark a PDF — the settings that look deliberate, and what a watermark cannot do.
How to crop a PDF without losing anything
Trimming the margins off a scan without losing the page — and the one thing a crop does not do.
Questions
Is it really free, with no catch?
Yes. There is no server and therefore no running cost to cover, so there are no daily limits, no watermarks and no forced signup. Everything runs on the machine you are already using.
Are my documents private?
They never leave your device. There is no upload step at all — you can open your browser's network tab and watch that nothing is sent while a file is processed.
Does it work offline?
Once the page has loaded, yes. The processing libraries are served from this site itself rather than a third-party CDN, so no external request is needed during processing.
What is the file size limit?
Your device's memory. Documents up to roughly 150 MB are comfortable on a typical laptop; very large files need a bigger machine rather than a paid plan.
Do I need to install anything?
No. Everything runs in the browser, so there is no app, no extension and no plugin to install.
When you need more than a browser can do
Everything above is free and unlimited. A server version is useful only for jobs that are genuinely too big for a single browser tab:
| Job | Free (this site) | Server version |
|---|---|---|
| File size | Comfortable to ~150 MB | Up to 2 GB |
| Batch processing | One document at a time | Hundreds of files in a queue |
| Automation | Manual, in the browser | REST API for scripts and pipelines |
| Compression | Good | Better — server CPU is not shared with your laptop |