OnesAPK - Online Tool Collection
Rich collection of online tools, all tools process locally, protecting your privacy and security
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All Tools
JSON Formatter
OnesAPK JSON Formatter: format, minify, and validate JSON with JSONPath querying, syntax highlighting, and precise error line/column hints. Runs fully in your browser (Client-side) with no server upload—safer for sensitive JSON.
JSON Diff
OnesAPK JSON Diff: compare two JSON documents side by side and highlight additions, removals, and modifications. Includes Format, Minify, and recursive key Sort to reduce diff noise. Runs fully in your browser (Client-side) with no server upload—safer for sensitive JSON.
Password Generator
Free online password generator, quickly generate secure and random passwords with customizable length and character types (uppercase, lowercase, numbers, special characters), password strength detection, all generation done locally to protect your privacy and security
Code to Image
Free online code to image tool, convert code snippets into beautiful images with support for multiple programming languages and themes. Adjustable line numbers, supports download and copy. All processing is done locally to protect your privacy and security
MD5 Encryption
Quickly calculate MD5 hash of text input, supports case switching and copying. Real-time calculation of UTF-8 encoded MD5 digest, default lowercase, can switch to uppercase with one click. All calculations are done locally in the browser
Base64 Encode/Decode
Free online Base64 encode/decode tool, supports text encoding and decoding, URL-safe mode, 76-column line breaks, remove line breaks and other functions. All processing is done locally to protect your privacy and security
Text to QR Code
Online QR code generator: create scannable QR codes from text/URLs (and more), customize size/colors/error correction, then download PNG or copy the image. Runs locally in your browser (Client-side) with no uploads
QR Code Parser
Online QR code decoder: upload/drag/paste a QR image to extract its content (URL/text). Supports PNG/JPEG/WebP and one-click copy. Runs locally in your browser for better privacy
Text Case Converter
Text case converter: one-click UPPERCASE/lowercase conversion with copy. Useful for env vars, config keys, and domain/email normalization. Runs locally in your browser
Timestamp Converter
Convert Unix seconds/milliseconds to dates, support local/UTC and world timezone viewing
URL Parser
Online URL parser: break down protocol/host/port/path/query/hash and list query parameters in a readable table for copying. Runs client-side, great for API debugging and troubleshooting
Code Beautifier
Online code beautifier/formatter: format JS/TS/HTML/CSS/JSON/Markdown/YAML with Prettier-style rules. Configure indentation and print width to reduce formatting-only diffs. Runs locally in your browser
What to Eat
Add food options and randomly select what to eat today, solve decision fatigue. All options are saved locally to protect your privacy and security
Image Compressor
Free in-browser image compression and format conversion. Supports PNG, JPEG, WebP and more. Runs locally to keep your data private
Mortgage Calculator
Free online mortgage calculator, supports equal payment, equal principal, and interest-first repayment methods, supports prepayment calculation (shorten term or reduce payment), generates complete payment schedule and supports CSV export. All calculations are done locally to protect your privacy and security
Calorie Calculator
Enter energy per 100g (kJ) and the grams you ate (g) to calculate total energy and convert it to kcal. All calculations are done locally to protect your privacy and security