The online tool that
never sees your Files.
Compress and resize exam photos, signatures, and ID documents — Aadhaar, PAN, UPSC, SSC, and more. Everything happens right inside your browser. Nothing is ever uploaded.
We never see your photo.
Zero File UploadsIt's processed right here on your device — not uploaded, not stored, not sent anywhere. Don't believe us? Turn off your WiFi after this page loads — it'll still work.
Image Utilities
Our flagship local utilities for standard compression, resizing, formatting, and compiling.
Image Compressor
Compress JPG, PNG, WEBP, or HEIC files to exact KB targets instantly.
PopularImage Resizer
Resize images to exact pixel dimensions with locked aspect ratio or KB constraints.
Format Converter
Convert instantly between JPG, PNG, and WebP formats in-browser.
Image Cropper
Crop to standard aspect ratios, freeform selections, or passport photos.
Image to PDF
Convert and compile multiple images into a single clean PDF document.
PDF Tools
Client-side document recompression and password-protected Aadhaar PDF processing.
Government Portal Resizers
Pre-configured templates matching official job & exam guidelines.
Passport Photo Resizer
Resize and compress photos according to Indian Passport and general visa standards.
NSDL / UTIPAN Card Photo Resizer
NSDL & UTIITSL application photos formatted to 213x312 px under 30KB.
NSDL / UTIPAN Card Signature Resizer
NSDL & UTI PAN card signatures resized to exact dimensions under 45-55KB.
SSC CGL / GDSSC Signature Resizer
Resize signature scans to 4.0cm x 2.0cm under 20KB for Staff Selection Commission forms.
Medical FormsNEET Photo Resizer
Format passport and postcard photos between 10KB and 200KB for NTA NEET portals.
Civil ServicesUPSC Image Resizer
Format civil services photo and signature uploads to UPSC portal specifications.
📂All Govt Portal Tools
Browse all 13 exam & portal resizers including UPSC, NEET, TNPSC & SSC.
Unit Storage Converters
Perform instant calculations and scale digital capacities client-side.
MB to KB Converter
Convert megabytes (MB) to kilobytes (KB) values and compress photo sizes from MB to KB.
CalculationsKB to MB Converter
Convert kilobytes (KB) to megabytes (MB) and resize photo files under KB limits.
Math UnitGB to MB Converter
Convert gigabytes (GB) to megabytes (MB) instantly using our digital conversion calculator.
Date & Time Tools
Perform client-side calendar calculations, date differences, and add/subtract days instantly.
Days From Today Calculator
Add or subtract days from today or any start date to find the corresponding calendar date instantly.
Core ToolDays Between Two Dates Calculator
Calculate the exact number of days, weeks, and calendar months between any two custom dates.
Core ToolDays Ago Calculator
Enter any number of days to calculate the calendar date and day of the week in the past instantly.
Popular90 Days From Today
Calculate what date falls exactly 90 days from today or 90 days ago instantly.
About ZapToolHub
ZapToolHub started as a way to solve one specific, maddening problem — getting a photo down to an exact KB size for a government exam form without destroying it in the process. That's still the tool most people find first. But the same idea — take a genuinely useful utility, run it entirely inside your browser instead of on a server somewhere, and never ask you to upload a file to use it — turned out to apply well beyond photos.
Today that means four tool categories living under one roof: image tools for compressing and resizing photos and signatures to exact specifications, PDF tools for shrinking scanned documents and password-protected files like e-Aadhaar, date and time calculators for everything from visa-window math to project deadlines, and unit converters for translating between KB, MB, GB, and TB when a file size number stops making intuitive sense. None of them need an account. None of them have a file size cap designed to push you toward a paid tier. And none of them ever see your file, because none of them ever receive it — every calculation and every compression happens on your own device, in your own browser tab.
That last part isn't a slogan, it's an architectural choice you can verify yourself: load any tool on this site, then turn off your WiFi. It keeps working, because it never needed a connection to begin with.
Frequently Asked Questions
Is ZapToolHub really free, with no account or sign-up?
Yes — every tool on the site is free, with no account required, no email capture, and no hidden usage limits. There's no paid tier that unlocks a "real" version of any tool.
Does ZapToolHub only do image compression?
No — that's the most popular starting point, but the site also has a full set of PDF tools (general compression, page numbering, and a dedicated e-Aadhaar PDF compressor), date and time calculators (days from today, days between dates, days ago), and unit converters for translating between KB, MB, GB, and TB.
Is my file actually private, or does it just get deleted afterward?
It's private because it's never received in the first place, not because it's deleted afterward. Every tool processes your file locally, inside your browser, using your device's own processing power — there's no server involved at any point, so there's nothing to delete and nothing to leak.
Do I need to install anything or create an account?
No — every tool runs directly in your web browser, on both desktop and mobile, with no app to install and no account to create.
Which tool should I start with?
If you're compressing a photo or signature for an exam or government form, start with the Compress Image tool or the specific government-portal preset for your exam (UPSC, SSC, PAN, NEET, and others are pre-configured). If you're working with a PDF, start with the general PDF Compressor. For quick date math or unit conversions, the Date & Time Tools and Unit Converters sections have dedicated calculators for the most common needs.