No login · No install · Works instantly
Work with files, text and numbers in your browser, with instructions to check your results and understand each tool’s limits.
How 3sec works
A result is only useful when you know where the data went, how it was calculated, and what to check next.
PDF merging, image compression, and EXIF removal run inside the current browser tab instead of sending files to our server. Closing the tab clears the working copy, which suits offices, public agencies, and legal teams that cannot use cloud upload services.
There is no email form, subscription choice, or seven-day trial that later starts charging. When a tool finishes, you can download or copy the result without meeting a registration wall at the final step.
ROC date conversion, business number checks, receipt lottery results, labor pension, health insurance, and electricity tiers follow local formats and rules. Lunar dates, zodiac signs, and date selection cover tasks that generic utility sites usually leave out.
Real tasks and checks
Practical walkthroughs that explain the steps, how to verify the result, and where each method stops being reliable.
A short table does not prove a short file. The preview searc…
Shuffle a disposable copy, not the attendance record. Treat …
Pattern masking is a first pass; organization-specific ident…
A remembered five-hour difference can become four for severa…
Fix the heading paragraph or its style in desktop Word; PDF …
A rejected or preserved snippet is a safety boundary, not a …
3sec
Tools for files, text and everyday calculations. No sign-up.
