Everyday file and developer tools that run in your browser
97 tools for PDFs, images, video, code, text and calculations. Almost all of them process your data inside the page, so your file never leaves your device — and every tool page tells you exactly what it does with your input, including where that is not true.
No upload for most tools
PDF, image, text and calculator tools read your file in the page and build the result there. There is no upload step, so there is no copy of your document on a server to be retained, leaked or subpoenaed.
Stated per tool, not in a slogan
Each tool page has a data-handling section describing what that specific tool does: whether anything is downloaded, whether any request is made, and what is stored. Where a tool does contact a third party, it says so.
Limits written down
Every tool page lists what it cannot do — unsupported formats, accuracy limits, cases that will fail. Knowing the edges before you rely on a result is more useful than a longer feature list.
Browse by category
Each category page explains how that group of tools works and what it can and cannot handle.
- PDF ToolsMerge, split, rotate, crop, sign, watermark, number, compress and convert PDF files in your browser.
- Developer ToolsFormat and validate JSON, test regular expressions, decode tokens, convert data formats and inspect schedules.
- Image ToolsCompress, crop, convert, blur faces in, and extract colours from images in your browser.
- Security ToolsGenerate passwords and UUIDs, compute hashes and HMACs, inspect JWTs, and encrypt text.
- Unit ConvertersConvert length, weight, temperature, volume, area, speed, time, power, energy, pressure, data and storage units.
- Video and Audio ToolsRecord your screen, trim video, convert audio, and turn a clip into an animated GIF.
- Financial CalculatorsEstimate mortgage, loan, car, credit-card, investment and retirement figures with standard formulas.
- Health and Fitness CalculatorsCalculate BMI, BMR, calorie needs, macros, body fat, ideal weight and pregnancy dates from published formulas.
Frequently used tools
Merge PDF
Combine several PDF files into one, in the order you choose.
JSON Prettier
Format and validate raw JSON data.
Compress Image
Reduce image file size with an adjustable quality setting.
Password Generator
Create strong, random passwords.
Compress PDF
Reduce PDF file size, with the real saving reported honestly.
Mortgage Calculator
Estimate monthly payments including property tax, insurance and HOA fees.
QR Code Generator
Create QR codes from text/URL.
Video Trimmer
Trim video clips precisely.
Guides
Written explanations of the problems these tools deal with, for the times the tool alone is not the whole answer.
- What “processed in your browser” really means
Which parts of a browser-based tool touch the network, which do not, and how to check for yourself in DevTools.
- Fixing invalid JSON: the eight errors that cause most failures
Trailing commas, single quotes, unescaped characters, NaN, duplicate keys and large integers — with the exact parser message each one produces.
- Password strength, measured properly
Why length beats complexity rules, how entropy is calculated, and what a generated password protects you from.
- Hashing, HMAC and encryption are three different things
What each one is for, which of them you can reverse, and why MD5 still has a legitimate use.
- Why PDF compression sometimes does nothing
What actually occupies space in a PDF, which files can shrink, and the trade-off you accept when pages are rasterised.
Common questions
Are my files uploaded to a server?
For almost every tool, no. Files and text are read into the page by your browser and processed there, so nothing is transmitted. Three tools are exceptions worth naming: the media tools download the FFmpeg engine from a public CDN before they can run, PDF text recognition downloads its language data the same way, and Device Info asks this site's server for your public IP address. Each of those pages says so.
Do I need an account?
No. There is no sign-up, no login and no email collection anywhere on the site.
Is there a file size limit?
No limit is imposed. Because processing happens on your own device, the practical ceiling is your available memory, which is usually far more generous than an upload cap would be.
Does the site make money, and how?
The tools are free. The site carries advertising to cover its costs, and it uses Google Analytics to see which tools are used. Both are described in the privacy policy, and both are covered by the cookie choice you are offered on your first visit.
Can I use the tools offline?
Most of them, once the page has loaded, because they make no further network requests. The media tools and PDF text recognition are the exceptions: they need a connection to download their engine on first use.
Who builds and maintains this?
It is an independently built and maintained project, not a company product. The source code is public on GitHub, which means the privacy claims on this site can be checked rather than taken on trust.
About this site
PrivaQuickTools is an independently built collection of browser-based utilities. It exists because the common alternative — uploading a document to an unfamiliar server to perform a small change — asks for more trust than the task warrants. The source code is public, so the claims made here can be checked.