A bookmark should earn its place
The best browser tool is not necessarily the one with the longest feature list. It is the one that finishes a specific job without sending you through an onboarding tour. A document needs a word count. A product photo is too large. A quick explanation would be easier as a drawing. Different jobs, different tabs.
I would build a short toolkit around six everyday situations, rather than sign up for a giant all-in-one platform before you know what you need.
Images: use Squoosh for size, Photopea for actual editing
Squoosh is the tab for a heavy image that needs to become lighter. It offers browser-based compression, with a useful way to compare output quality against file size. Google Chrome Labs' project documentation says image compression runs locally; it also notes basic usage analytics, so 'private processing' should not be confused with 'no site data at all'.
Photopea solves a different problem. If you need layers, masks, a more advanced selection, or a design adjustment, it is a fuller graphics editor in the browser. Its own guide describes local file processing. If you simply need a PNG converted to WebP or JPEG, our RezSat image converter is quicker; no editing suite required.
Planning: Excalidraw gets a rough idea out of your head
Some discussions get stuck because everybody is using words to describe a layout. The free Excalidraw editor is good for turning the conversation into boxes, arrows and quick sketches. It works without an account. There is also a separate paid Plus service, so check which workspace you are using if you need cloud collaboration features.
Treat a sketch as a conversation starter, not your final specification. A rough diagram that makes everybody agree on the direction is often more valuable than a polished one that takes half the afternoon.
Websites: PageSpeed Insights tells you what to investigate
A website that feels slow on a laptop can feel unbearable on mobile data. PageSpeed Insights gives you page-performance diagnostics, using lab analysis and, where available, real-user experience data. Don't obsess over a single score after every image change; use its suggestions to identify the largest practical bottlenecks.
For small fixes nearby, RezSat's word counter, JSON formatter and URL encoder handle the little follow-up tasks without asking you to create an account.
Text and code: keep the tiny tools tiny
For line-by-line edits, RezSat Text Compare highlights what was added or removed. For a list copied from a form or spreadsheet, Remove Duplicate Lines gives you a clean first-occurrence list. Both solve a small but common problem without asking you to install an extension.
When a regular expression needs debugging, regex101 is more capable than a plain find-and-replace box. Its free editor supports explanations, matching and unit tests. Some advanced debugging features have paid limits, so it is worth reading the plan details before depending on a specific feature.
The rule for choosing what to keep
Ask three questions: Does it do the job reliably? Does it clearly explain what happens to my files? Can I leave with the result without building my whole workflow around it? If the answer to all three is yes, bookmark it. If not, keep looking.
And before pasting private customer documents or passwords into any online utility, read how that particular service processes data. 'Runs in a browser' by itself doesn't tell you enough.
Useful links and sources
These links point to the original tool or official documentation. Features and free-tier limits may change.
- Squoosh — Browser image compression and comparisons
- Photopea — Layer-based browser photo editing
- Excalidraw — Free sketching and simple diagrams
- Google PageSpeed Insights — Performance checks for web pages
- regex101 — Regular expression testing and explanations