Niuma Tools
Sharpen your tools, empower your work
— Equipping every worker with the best utilities.
Programming
18 features ready
JSON Formatter
Parse standard JSON into indented or compact text, with escaping, unescaping and Unicode text conversion.
SQL Formatter
Format queries for MySQL, PostgreSQL, SQLite, T-SQL and other dialects without connecting to a database or executing SQL.
XML Formatter
Format XML as readable indented text or remove layout whitespace, with parsing errors shown in the output area.
JWT Decoder
Decode the first two parts of a three-part JWT into JSON. This inspects claims without verifying signatures or token validity.
Base64 Converter
Encode text as Base64 or decode Base64 into UTF-8 text. The encoding is reversible and provides no encryption.
URL Encode/Decode
Apply encodeURIComponent rules to parameter values and inspect a full URL’s protocol, host, path and query parameters.
Regex Tester
Enter a pattern and flags to inspect matched text, positions and capture groups, with built-in pattern references.
UUID Generator
Generate 1–100 random UUID v4 values, adjust case and hyphens, and copy individual values or the batch.
Password Generator
Generate passwords from a length and character set, or inspect character-set-based strength and brute-force time estimates.
Time Converter
Convert Unix timestamps and dates while viewing the device’s local time alongside UTC.
Hash Generator
Compute SHA-1, SHA-256, SHA-384 and SHA-512 digests of UTF-8 text and copy results by algorithm.
Text Counter
Count string length, non-whitespace length, whitespace-separated words, lines and blank-line-separated paragraphs.
Case Converter
Produce camelCase, PascalCase, snake_case, kebab-case and other naming formats, alongside text case variants.
MD5 Generator
Compute the 32-character hexadecimal MD5 of text, with case variants and the middle 16-character form.
Bcrypt Hashing
Generate a Bcrypt hash with a cost parameter, or compare plaintext with an existing hash.
RSA Key Generator
Generate RSA key pairs using browser Web Crypto, exporting the public key as SPKI and the private key as PKCS#8 PEM.
Code Diff
Compare text side by side or in a unified view, showing added, removed and unchanged content.
Markdown Preview
Render Markdown, inspect the preview and copy sanitized HTML to check headings, lists and links.
AI
3 features ready
Session Format Converter
Convert ChatGPT Session JSON containing accessToken to CPA, Cockpit or sub2api structures. Gemini and Claude entries are not available yet.
AI Prompts
Browse built-in prompts for coding, writing and translation, then copy a template into your chosen AI service.
AI Image Prompts
Browse prompt examples by source and category, search keywords, inspect reference images and copy prompts for an external image service.
DevOps
6 features ready
Crontab Generator
Set minute, hour, day, month and weekday fields, then inspect the explanation and upcoming-run preview.
YAML ⇋ JSON
Parse YAML or JSON and output the other format to compare configuration data and API structures.
IP Lookup
Look up your public IP or a specified address using multiple third-party location-data providers.
Port Scanner
Send browser requests to a specified host and ports, showing response states and timing for connectivity troubleshooting.
MAC Address Lookup
Match a MAC prefix against the OUI vendor data bundled with the tool.
IPv4 Subnet Calculator
Enter an IPv4 address and prefix or mask to inspect the network, broadcast address and host range.
Design
8 features ready
Color Converter
Convert HEX, RGB, HSL and other color representations, with previews and reference contrast values against black and white.
Image Processor
Add a text watermark, adjust JPEG compression quality or crop a selected area of one image, then download the result.
App Icon Generator
Generate preset Web, iOS and Android PNG icons from one source image and download a ZIP archive.
AI Background Removal
Download the RMBG model, estimate a foreground mask in a browser Worker and compose a transparent PNG.
AI Image Upscaler
Choose a Swin2SR 2× or 4× model to process low-resolution images in the browser.
QR Code Generator & Reader
Create QR codes for text and URLs, customize colors and a logo, or read QR content from an image.
File ↔ Base64
Read a local file as Base64/Data URL, or restore encoded bytes into a downloadable file.
SVG Placeholder
Set dimensions, background and text to generate a placeholder, then copy SVG code or download SVG or PNG.
Video
1 features ready
Documents
2 features ready
Excel/CSV/JSON Converter
Read worksheets or JSON, preview records and export JSON, CSV or XLSX, focusing on data rather than full office-document layout.
PDF Processor
Merge, split, reorder, watermark and convert documents in the browser. Check a small sample before converting complex files.
Psychology
2 features ready