Free tools that run in your browser
40+ free utilities — no signup, no uploads, nothing leaves your device.
Most "free" tool sites upload your files to a server, wrap the output in a watermark, or gate the good features behind a login. JobStraight's free tools do the opposite: everything runs on your own device using your browser, so your files and text never leave your computer, there's no signup, and nothing is watermarked. It even keeps working offline once the page has loaded.
The kit covers the everyday jobs you'd otherwise hunt across a dozen sites: a PDF Toolkit to merge, split, rotate, watermark, add page numbers, extract text and sign; an Image Toolkit to compress, resize, convert (JPG/PNG/WebP), crop and turn iPhone HEIC photos into JPG; a Text Toolkit for word counts, case conversion, JSON and CSV, secure SHA hashes, UUIDs, QR codes and strong passwords; and Everyday Tools for salary conversion, unit conversion, percentages, dates, roman numerals and colour-contrast checks. Two more round it out: a Compare tool that diffs two texts, PDFs or Word documents line by line, and a Notepad that auto-saves your notes on the device and syncs across devices when you sign in.
Because there's no backend, the tools are fast and completely private — ideal for anything sensitive like a resume, an offer letter or an ID document you just need to convert or compress once. Free forever, no catch.
- ✓PDF, image, text and everyday-converter tools in one place
- ✓Compare documents + an auto-saving notepad
- ✓100% in your browser — nothing uploaded, no watermark
- ✓Free, no signup, works offline once loaded
Why browser-native means your files stay yours
Most 'free' online tools follow a pattern: you upload a file, the server processes it, you download the result, and you never quite know what happened to your file in between. It might be deleted after an hour, or it might sit in a server backup indefinitely. The platform might use it to train models or sell anonymized analytics. The watermark on your PDF is a reminder that the free tier is the product, not the service. The genuine free option is different: a tool that runs entirely in your browser, processing everything on your device, so your file never leaves your device.
This is not a privacy theater trick. A browser-native tool runs JavaScript directly in your browser's sandbox, which means the code executes on your machine with access to files you choose, and nowhere else. Your browser has no way to send your files to a server unless the code explicitly does so, and the code here does not. You can verify this by opening your browser's network tab and watching for outbound requests — there will be none (except to load the page itself). Offline mode proves the point: download the page once, then disconnect your internet. The tools continue working because they run locally, not because they have cached logic on a server.
This also makes the tools fast. A server-based tool has to send your file over the internet, wait for the server to process it, and wait for the result to come back — at minimum two round-trips. A browser tool processes on your device instantly. A 100 MB PDF merge that would take 30 seconds via upload/process/download takes 3 seconds in the browser because there is no network latency. Speed is the side effect of keeping your data local.
What really makes a free tool free
Watermarks are the tell. If a tool adds a watermark to your output, it is signaling that the free tier exists to frustrate you into paying. The watermark does not make the tool more useful; it makes the free version unusable for anything you might actually ship. This is not free, it is a dark pattern. A genuinely free tool produces output you can actually use: a clean PDF without a 'converted by X' banner, an image without a logo in the corner, text without any markup.
Signup requirements work the same way. A tool that requires you to create an account and log in before you can use it is gating access to track you, not to provide a service. Login gates typically lead to upselling later ('upgrade for faster processing', 'premium download speeds') and to email lists. A free tool that requires no signup and no tracking is rare enough that it is worth noting. The privacy policy should be simple: files stay on your device, the tool is open-source or the source code is published, and there are no analytics tracking what you do.
File size limits are legitimate when they are high or nonexistent. A tool that limits you to 5 MB files is effectively gated if your use case is PDFs averaging 50 MB. A tool that limits you to 100 files per day is tracking usage to upsell you later. A tool that lets you process files as large as your browser's memory can handle (typically gigabytes) is being generous. JobStraight's free tools have no file limits and no usage limits because they run on your device and cost nothing to serve once the page loads.
When and why to reach for private browser tools
Private tools are the right choice for anything sensitive. A resume with your salary history, an offer letter, a tax document, or an ID you need to convert — these are things you probably don't want sitting in a server's processing queue or backup storage, even briefly and even at a reputable company. Using a tool that keeps the file local eliminates that risk. The paranoia is justified: data breaches happen, employee access is overly broad at most companies, and once a file is uploaded it is harder to scrub than if it never left your device.
Private tools are also the right choice when you are in an environment with network restrictions. A corporate firewall might block uploads to external websites, or your internet might be metered (you are on mobile data and data is expensive). A browser tool that runs offline uses zero bandwidth once loaded. Download the page once at home, then use it at work or on a flight where network is restricted. This is genuinely useful and it is not possible with a server-based tool.
Private tools are valuable even for non-sensitive tasks simply because they are faster and simpler. You have a random task — convert ten HEIC photos to JPG, merge three PDFs, hash a password, generate a QR code — and you want it done instantly without signup, without ads, without waiting for a server. The friction of uploading a file is real even when the tool is trustworthy. A browser tool loads in one click and does the job before you have even thought about where to save the output. For the everyday utilities that most people do once a month, the speed difference is meaningful.
Frequently asked questions
How do I know the tool isn't sending my files to a server?
Open your browser's network tab (F12, Network), then use the tool. You will see no outbound requests for your file uploads or processing. Alternatively, disconnect your internet and use the tool offline — if it works, the processing is local. Our tools work offline once the page loads.
Can I use these tools on my phone or tablet?
Yes. All tools run in your mobile browser. Some tasks (editing large PDFs) are easier on a desktop, but the tools work on any device with a modern browser. File handling and download work the same way as desktop.
What if my browser crashes? Will I lose my file?
The tool will crash but your original file is safe — it was never uploaded. Start fresh: reload the page and reprocess the file. Some tools (like the Notepad) auto-save your work to your device, so you won't lose edits, but for single-use tools like PDF merge, you are starting over.
Do you support every file format (PDF, DOCX, JPG, PNG, etc.)?
The toolkits cover the most common formats. PDF tools handle PDFs and images. Image tools handle JPG, PNG, WebP, HEIC (iPhone photos), GIF and AVIF. Text and document tools handle plain text, JSON, CSV, Word (.docx) and markdown. Check the tool's page for the full supported list.
Can I batch-process multiple files at once?
Most tools process one file at a time through the UI. For batch work (converting 50 photos, say), process them in a loop — drag ten in, wait for conversion, drag the next ten. Some tools support drag-and-drop of multiple files, which is faster. The Image Toolkit supports batch upload.
Part of JobStraight — the honest AI job-search platform. Runs in your browser; your data stays on your device.