Free media tools that never upload your files
Convert video, extract MP3 audio, compress images in bulk and merge PDFs — all processed locally in your browser with WebAssembly. No accounts, no watermarks, no limits.
Free Online Video Converter — MP4, WebM, GIF
Drop a video, choose an output format and convert it entirely inside this tab using FFmpeg compiled to WebAssembly.
Drop a video file here, or click to choose
Engine loads on first use (~25 MB, cached afterwards).
How to convert a video without uploading it
Traditional online converters ask you to upload your footage to a stranger's server, wait in a queue and trust that the copy is deleted afterwards. This converter takes a different route: the FFmpeg engine is downloaded to your browser once, then every frame is decoded, re-encoded and muxed on your own CPU. Nothing is transmitted, so a 2 GB wedding video is just as private as a 2 MB clip.
Pick MP4 for maximum compatibility — it plays on every phone, TV, editor and social platform. Choose WebM when you want smaller files for a website and don't care about older Safari versions. Export an animated GIF for short reaction loops, keeping the clip under roughly ten seconds since GIF stores each frame with no interframe compression. MKV and AVI are useful for archival workflows and legacy editing suites.
Choosing the right resolution
Downscaling is the single fastest way to shrink a file. Halving the width and height removes about three quarters of the pixels and typically cuts the bitrate requirement by a similar margin. For social uploads 720p is virtually indistinguishable from 1080p after the platform re-encodes, and 480p is perfect for email attachments or documentation clips.
Performance notes
Conversion speed depends on your processor, not your internet connection. A modern laptop encodes roughly real time for 1080p H.264; older machines and phones will be slower, so keep the tab in the foreground and avoid running large jobs on battery saver. Very long files can exhaust browser memory — split anything over about twenty minutes before converting.
Is there a file size limit?
Only the memory available to your browser tab, typically 2–4 GB. Because nothing is uploaded, there is no server-side cap.
Does converting reduce quality?
Any re-encode is lossy. Converting once at a sensible resolution keeps quality high; repeatedly converting the same file degrades it.
Can I convert on my phone?
Yes, but mobile browsers have far less memory. Short clips work well; long 4K recordings are better handled on a desktop.
Extract MP3 Audio From Video — Free & Private
Pull a clean audio track out of any video file and download it as MP3, WAV or M4A without uploading a byte.
Drop a video or audio file here, or click to choose
Works with MP4, MOV, MKV, WebM, AVI and more.
Why extract audio locally
Lecture recordings, interviews, podcast raw takes and voice memos are some of the most sensitive files people own, yet they are routinely handed to anonymous conversion websites. Because this extractor runs in your tab, the audio stream is demuxed and encoded on your device and handed straight back as a download link. You can verify it: open your browser's network panel and watch that no request carries the file.
Which format should you pick?
MP3 at 192 kbps is the safe default — universally playable and small enough to email. Step up to 320 kbps for music you intend to keep, or drop to 96–128 kbps for speech-only recordings where file size matters more than fidelity. Choose WAV when the audio will be edited further, since it is uncompressed and avoids stacking generation loss. M4A/AAC gives better quality than MP3 at the same bitrate and is the native choice inside the Apple ecosystem.
Common uses
Turn a recorded video call into a podcast episode, keep the soundtrack of a performance without the 4K footage, build a transcription-ready audio file for a research interview, or salvage a voice note that was accidentally captured as video.
Will the audio quality drop?
Choosing WAV or a bitrate at or above the source keeps quality effectively identical. Very low bitrates audibly degrade music but remain fine for speech.
Can I extract from a YouTube link?
No. This tool only processes files already on your device, which keeps it firmly on the right side of copyright rules.
Bulk Image Compressor — JPG, PNG & WebP
Shrink dozens of photos at once, optionally converting them to WebP, then download everything as a ZIP.
Drop JPG, PNG or WebP images here, or click to choose
Everything runs on your device — no uploads.
How much smaller will my images get?
Photographs straight from a phone camera usually shrink by 60–85% at quality 70 with no difference visible at normal viewing size. Screenshots and graphics with flat colour compress even harder when converted to WebP, which routinely beats JPEG by another 25–35% at matched quality. Images that are already heavily compressed will barely change, and that is the correct behaviour — re-compressing an optimised file only adds artefacts.
Why page weight matters for SEO
Images are the largest component of most web pages, and Largest Contentful Paint is a direct Core Web Vitals ranking signal. Serving a 4 MB hero photo where a 250 KB one would do can add seconds to a mobile load on a slow connection. Compressing before upload also lowers hosting bandwidth costs and speeds up your own CMS.
Practical settings
Use quality 80–90 for portfolio and product photography where detail is the point. Quality 65–75 is ideal for blog images and thumbnails. Below 50, banding appears in skies and gradients. Tick WebP for anything destined for the web, but keep JPEG when the file will be sent to a printer or opened in older desktop software.
Is metadata removed?
Re-encoding strips most EXIF data, including GPS coordinates — a useful privacy side effect before publishing photos.
How many images at once?
There is no hard limit. Batches of a few hundred work fine; the browser processes them one at a time in a worker thread.
Merge PDF Files Online — Free, No Upload
Combine contracts, scans, invoices and reports into one document. Drag the rows to set the page order.
Drop your PDF files here, or click to choose
Add two or more PDFs, reorder them, then merge.
Merging sensitive documents safely
The documents people most often need to merge — signed contracts, tax returns, medical scans, passport copies for a visa application — are exactly the documents that should never be uploaded to an unknown service. This merger rewrites the PDF page tree inside your browser, so the finished file appears in your downloads folder without any server ever holding a copy.
Getting the order right
Files are merged top to bottom in the list. Drag any row to reposition it and remove anything added by mistake. A common pattern for applications is: cover letter, main form, supporting evidence, then appendices. Scanned pages keep their original orientation, so rotate them in your scanner software before merging if needed.
Limitations to know
Password-protected PDFs must be unlocked first, since an encrypted page tree cannot be read. Interactive form fields and digital signatures may not survive a merge — signatures cover the original document only, so combining files invalidates them by design. Very large scanned bundles can be slow because every page object is copied into the new document.
Are my PDFs uploaded?
No. Merging happens entirely in your browser tab and the result is generated locally.
Can I merge more than two files?
Yes — add as many as you like and reorder them freely before merging.
Privacy Policy
Last updated: this policy applies to the current version of the site.
1. The short version
ProToolkit does not receive, store, inspect or transmit the files you process. Every conversion, compression and merge is performed by code running inside your own browser. There is no upload endpoint and no processing queue, because there is no server involved in handling your content.
2. Information we do not collect
We do not collect your name, email address, phone number, postal address or payment details, because the site has no accounts, no newsletters and no paid tiers. We do not collect the names, contents, thumbnails or metadata of the files you open in any tool.
3. Information that is processed automatically
Like any website, requests to our host generate standard technical logs which may include IP address, user agent, referring page and timestamp. These are used for security and aggregate traffic measurement, and are retained only as long as needed for those purposes.
4. Cookies and local storage
The tools themselves do not require cookies. Your browser may cache the WebAssembly engines so repeat visits load faster; this cache lives on your device and can be cleared at any time through your browser settings.
5. Advertising
Hosting is funded by advertising placements. Advertising partners may set their own cookies or identifiers to limit repetition and measure performance, subject to their own privacy policies. Advertising code has no access to the files you process, which never leave the memory of your tab. You can opt out of personalised advertising through your regional opt-out tools or your browser's privacy controls.
6. Your rights
Because we hold no personal data tied to your use of the tools, most access and deletion requests have nothing to act on. If you are in the EEA, the UK, California or another region with data protection legislation and you believe we hold data about you, contact us and we will respond within the statutory period.
7. Children
The site is not directed at children under 13 and we do not knowingly collect data from them.
8. Changes
Material changes to this policy will be reflected on this page with a revised date.
Terms of Service
1. Acceptance
By using ProToolkit you agree to these terms. If you do not agree, please do not use the site.
2. The service
ProToolkit provides free, browser-based utilities for converting video, extracting audio, compressing images and merging PDF documents. All processing is performed locally on your device. The service is provided without registration and without charge.
3. Acceptable use
You agree not to use the tools to process material you do not have the right to process, to infringe copyright or other intellectual property rights, to create unlawful content, or to attempt to disrupt, reverse-engineer for malicious purposes, or overload the site or its hosting infrastructure.
4. No warranty
The tools are provided "as is" and "as available", without warranties of any kind, express or implied, including merchantability, fitness for a particular purpose and non-infringement. Media processing is complex and results vary with file format, codec and browser. Always keep an original copy of any file before processing it.
5. Limitation of liability
To the maximum extent permitted by law, we are not liable for any indirect, incidental, special, consequential or exemplary damages, including loss of data, profits or goodwill, arising from your use of or inability to use the service.
6. Third-party content
The site may display advertising and link to third-party resources. We are not responsible for the content, policies or practices of those third parties.
7. Changes and termination
We may modify, suspend or discontinue any part of the service at any time without notice. Continued use after changes to these terms constitutes acceptance of the revised terms.
8. Governing law
These terms are governed by the laws applicable at the operator's principal place of business, without regard to conflict-of-law rules.
DMCA / Copyright Policy
Our position
ProToolkit does not host, store, index or transmit user files. Every tool operates entirely within the visitor's browser, so there is no repository of user content for us to search, disable or remove. We nevertheless respect intellectual property rights and respond to properly submitted notices.
Submitting a notice
If you believe material published on this website itself infringes your copyright, send a written notice to dmca@protoolkit.example including: a physical or electronic signature of the rights owner or an authorised agent; identification of the copyrighted work claimed to be infringed; the exact URL of the allegedly infringing material; your contact details; a statement of good-faith belief that the use is not authorised; and a statement, under penalty of perjury, that the information is accurate and you are authorised to act.
Counter-notification
If content you posted was removed in error, you may submit a counter-notification containing your signature, identification of the removed material and its former location, a statement under penalty of perjury that the removal resulted from mistake or misidentification, and your consent to the jurisdiction of the appropriate court.
Repeat infringers
Access to the site may be terminated for anyone determined to be a repeat infringer.
About & Contact
ProToolkit is a small suite of media utilities built on one principle: your files should never have to leave your computer to be useful. Modern browsers can run FFmpeg, re-encode images in worker threads and rewrite PDF page trees at near-native speed, which makes the server round-trip unnecessary for the vast majority of everyday file tasks.
What it costs
Nothing. There are no accounts, no premium tiers and no watermarks. Hosting is funded by modest advertising placements, which never have access to the content you process.
Contact
General and support: hello@protoolkit.example
Privacy requests: privacy@protoolkit.example
Copyright notices: dmca@protoolkit.example
Bug reports are especially welcome — include your browser, operating system and the file type that caused the problem, but never attach the file itself.
Frequently asked questions
Are my files uploaded to a server?
No. Every tool runs inside your browser using WebAssembly, so your videos, images and PDFs never leave your device.
Do I need an account or a subscription?
No sign-up, no email, no watermarks and no file-count limits.
Does it work offline?
After the engines are cached, most tools continue to work with a flaky connection. The first run of the video and audio tools needs the network to fetch FFmpeg.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox, Safari, Brave and Opera on desktop and mobile.
Is it really free?
Yes. Advertising covers hosting, and the ads never see your files.