01 — Ranking
The 6 best options, ranked
PDF24 Tools
tools.pdf24.org
4.7More than 30 free PDF tools with no limits, no sign-up and no watermarks.
- Best for
- Frequent everyday PDF work: merge, compress, edit, sign, OCR and convert.
- Free plan & limits
- Free and unlimited, with no account. Files are deleted automatically after 1 hour. The online editor adds text, images and drawings, but editing existing text is basic. There is also a free Windows desktop app (PDF24 Creator) that works offline.
Sejda PDF Editor
sejda.com
4.6Online editor that changes existing PDF text in place, keeping the fonts.
- Best for
- Fixing typos, dates or numbers inside an existing PDF's text.
- Free plan & limits
- 3 tasks per hour, documents up to 200 pages or 50 MB, and up to 50 images per task. Files are deleted after 2 hours. The desktop version has similar free limits. Web Week Pass costs about 5 USD for unlimited use for 7 days.
Adobe Acrobat online
adobe.com
4.4Adobe's free browser tools with the best compatibility for complex PDFs.
- Best for
- Filling and signing forms, commenting, and occasional conversions with maximum fidelity.
- Free plan & limits
- Free with an Adobe account for filling and signing forms, commenting and highlighting. Editing text, conversions and other tools are limited to a small number of free uses before you need Acrobat Standard or Pro (from about 13 USD/month).
iLovePDF
ilovepdf.com
4.4Popular all-in-one PDF toolkit for the browser, desktop and mobile.
- Best for
- Batch merging, splitting, compressing and converting.
- Free plan & limits
- Free tools with per-task limits on file size and number of files. OCR, larger files and unlimited processing require Premium. Edit PDF lets you add text, shapes and images, but not change existing text. Files are deleted within 2 hours.
Smallpdf
smallpdf.com
4.0Polished PDF toolkit with e-signatures and Google Drive or Dropbox integration.
- Best for
- Quick one-off edits and signatures from cloud storage.
- Free plan & limits
- The free tier allows a small number of tasks per day (about 2), with limited access to some tools. Pro (about 9–12 USD/month) removes the limits and adds OCR and batch processing. A 7-day trial requires a card.
PDFgear
pdfgear.com
4.5Free PDF editor for Windows, macOS and iOS, plus online tools, with no sign-up.
- Best for
- Heavy users who want offline, unlimited PDF editing at 0 USD.
- Free plan & limits
- The desktop app is free with no task limits or watermarks: it edits text, fills forms, signs, converts and runs OCR, plus an AI chat assistant. The online tools are free too. Runs on Windows 10+ and macOS.
02 — Comparison
Side by side
Scroll sideways to see every tool. The first column stays pinned.
| Feature / Criterion | PDF24 Tools | Sejda | Adobe Acrobat online | iLovePDF | Smallpdf | PDFgear |
|---|---|---|---|---|---|---|
| Free usage limit | Unlimited | 3 tasks/hour | Limited free uses | Per-task size / file caps | ~2 tasks/day | Unlimited (desktop) |
| Edit existing text | Basic | Yes | Limited free uses | No (add text only) | Limited | Yes |
| Fill and sign forms | Yes | Yes | Yes | Yes | Yes | Yes |
| OCR | Yes | Yes | Paid | Premium | Pro | Yes |
| Watermark | No | No | No | No | No | No |
| Account required | No | No | Yes | No | For some tools | No |
| File deletion | After 1 hour | After 2 hours | Stored in Adobe cloud | Within 2 hours | After 1 hour | Local files (desktop) |
03 — Guide
How to edit a PDF online for free step by step
Identify the edit type
Changing existing text needs Sejda or PDFgear. Adding text, images, a signature or form fields works in any of the tools. If the PDF is a scan (you can't select text), run OCR first in PDF24 or PDFgear, otherwise there is no text to edit.
Check that the file is safe to upload
For contracts, IDs or medical records, use an offline tool instead: PDF24 Creator, PDFgear desktop, or the built-in Preview on macOS. Online tools delete files after 1–2 hours, but the file still passes through their servers.
Make the edit and match the font
In Sejda, click Edit → Text, then click the existing text. It reuses the embedded font when the font is fully embedded. If the font is only partially embedded, characters that weren't used in the original may fall back to Arial or Helvetica, so check the result at 200% zoom.
Flatten and compress before sending
Flatten form fields and annotations (Print to PDF works) so they can't be changed later and display the same everywhere. Compress large files in PDF24, which typically reduces image-heavy PDFs by 40–80%. Keep the file under 10 MB for email.
Verify the output
Open the final PDF in a second viewer, such as a browser and Adobe Reader, check the fonts and page count, and search for an edited word to confirm the text is real and searchable, not an image.
04 — FAQ
Common questions
Is a free online PDF editor really free, with no hidden costs?
PDF24 and PDFgear are free with no task caps or watermarks. Sejda is free within 3 tasks per hour. Adobe Acrobat online and Smallpdf use free-use limits to sell subscriptions, and Smallpdf's 7-day trial requires a card and auto-renews. None of the six tools adds watermarks to free output.
Can I edit the existing text in a PDF for free?
Yes, with Sejda (3 free tasks per hour) or PDFgear (unlimited on the desktop). Most other free tools only let you add text boxes on top of the page. A scanned PDF has no editable text until you run OCR.
Is it safe to upload PDFs to online editors?
Reputable tools use HTTPS and delete files after 1–2 hours (PDF24 after 1 hour, Sejda and iLovePDF within 2 hours). For sensitive documents, use an offline editor such as PDFgear desktop, PDF24 Creator or macOS Preview, so the file never leaves your device.
How do I sign a PDF for free?
Adobe Acrobat online, PDF24, Smallpdf and macOS Preview all let you add a drawn, typed or image signature for free. That is a simple electronic signature, valid for most everyday agreements under eIDAS in the EU and the ESIGN Act in the US. Contracts that need an audit trail or a qualified signature need a dedicated service such as Docusign or Dropbox Sign.
What are the best alternatives if I need advanced features?
Adobe Acrobat Pro (about 20 USD/month) is the reference for redaction, Bates numbering, preflight and accessibility tagging. PDF-XChange Editor (around 60 USD one-time) and Foxit PDF Editor are cheaper desktop alternatives. For large-scale automation, use developer libraries such as qpdf, pikepdf or Ghostscript, which are free and open source.
Scores reflect our own assessment of free-tier value. Prices and limits change, so check them on each provider's site before you buy.