NullKit

NullKit is a free, privacy-focused collection of 39 browser-based utilities for working with images, PDFs, links, credentials, and sensitive information. All tools run entirely in the user's browser, so files and data are never uploaded to a server. The service is available at nullkit.app and requires no installation or account. The toolkit covers common tasks such as converting HEIC/HEIF photos to JPG or WebP, compressing, resizing, cropping, and brightening images, removing photo EXIF/GPS metadata, redacting text in images and PDFs, merging, splitting, organizing, rotating, and password-protecting PDFs, generating and scanning QR codes, cleaning tracking parameters from links, calculating file checksums, and generating secure passwords or passphrases. It also includes privacy-planning checklists and a recovery-readiness checker. NullKit categorizes its tools into Images, PDF tools, Privacy, QR & links, Security, and Browser utilities. The user interface is simple and searchable, while advanced local processing models enable features like background removal and OCR-based redaction suggestions. Because processing happens locally, the tools are particularly suited for handling sensitive documents or photographs that users do not want to expose to cloud services.

Category: Privacy Security
Pricing: Free

Problem solved

NullKit solves the problem of needing quick file conversion and privacy utilities without risking sensitive data. Most online tools upload files to remote servers, which can create privacy and security concerns. NullKit's in-browser processing keeps all data on the user's device, so users can redact, convert, compress, or inspect files without sending them anywhere.

Use cases

Remove EXIF and GPS metadata from photos before sharing them online
Convert HEIC/HEIF files from an iPhone to JPG/PNG/WebP locally
Compress or resize images for web or email with no upload
Redact emails, phone numbers, IPs, or custom areas in images and PDFs
Merge, split, reorder, rotate, crop, protect, or unlock PDFs
Generate QR codes for URLs, Wi-Fi, contacts, or text; scan QR codes
Clean tracking parameters (UTM, fbclid, gclid) from shared links
Generate secure passwords or passphrases and verify file checksums

Audience

Hobbyists
Business Users
Designers
Content Creators
Startups

Pros

100% free
No file uploads; all processing is local
No installation or account needed
Wide range of utilities in one place
Simple, searchable interface

Cons

Some functions rely on in-browser machine learning and may be slow on older devices
Requires a modern browser with good WebAssembly support
Limited to manual use; no batch processing or API

Official website: https://nullkit.app/

Canonical LambdaBase page: https://www.lambdabase.com/tools/nullkit

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NullKit

Free

★ 1 • Updated Aug 28, 2026, 03:28 PM

NullKit is a free, privacy-focused collection of 39 browser-based utilities for working with images, PDFs, links, credentials, and sensitive information.

Use Cases ▼

Remove EXIF and GPS metadata from photos before sharing them online

Convert HEIC/HEIF files from an iPhone to JPG/PNG/WebP locally

Compress or resize images for web or email with no upload

Redact emails, phone numbers, IPs, or custom areas in images and PDFs

Merge, split, reorder, rotate, crop, protect, or unlock PDFs

Generate QR codes for URLs, Wi-Fi, contacts, or text; scan QR codes

Clean tracking parameters (UTM, fbclid, gclid) from shared links

Generate secure passwords or passphrases and verify file checksums

What Problem It Solves ▼

Key Features ▼

✓

100% free

✓

No file uploads; all processing is local

✓

No installation or account needed

✓

Wide range of utilities in one place

✓

Simple, searchable interface

Overview

Full Description ▼

The toolkit covers common tasks such as converting HEIC/HEIF photos to JPG or WebP, compressing, resizing, cropping, and brightening images, removing photo EXIF/GPS metadata, redacting text in images and PDFs, merging, splitting, organizing, rotating, and password-protecting PDFs, generating and scanning QR codes, cleaning tracking parameters from links, calculating file checksums, and generating secure passwords or passphrases. It also includes privacy-planning checklists and a recovery-readiness checker.

NullKit categorizes its tools into Images, PDF tools, Privacy, QR & links, Security, and Browser utilities. The user interface is simple and searchable, while advanced local processing models enable features like background removal and OCR-based redaction suggestions. Because processing happens locally, the tools are particularly suited for handling sensitive documents or photographs that users do not want to expose to cloud services.