Free and Secure Online Tools
Simple, fast and free online tools for everyday tasks.
All tools run locally in your browser — no data is sent to any server.
Text Tools
Text to Hex
Convert plain text into hexadecimal format.
Base64 Encode
Encode text into Base64.
Base64 Decode
Decode Base64 back to readable text.
JSON Formatter
Format and validate JSON data.
JSON ↔ YAML Converter
Convert JSON to YAML or YAML to JSON.
CSV ↔ JSON
Convert CSV data to JSON and JSON back to CSV.
JWT Decoder
Decode JWT tokens to view header and payload.
Line Tools
Sort, deduplicate, shuffle and count lines of text.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
Text Diff
Compare two texts line by line and highlight differences.
UUID / ULID Generator
Generate UUIDs and ULIDs instantly in your browser.
Hash Generator
Generate MD5 and SHA hashes instantly in your browser.
Case Converter
Convert text between upper, lower, camel, snake and more cases.
URL Encode / Decode
Encode or decode URLs using standard URL encoding.
Random String Generator
Generate secure random strings with custom length and characters.
File Tools
Image Converter
Convert images between PNG, JPG and WEBP formats.
Batch Image Converter
Convert multiple images at once and download them as a ZIP.
Image to Base64
Convert images to Base64 directly in your browser.
Base64 to Image
Convert Base64 encoded data back into an image.
Base64 File Encoder / Decoder
Encode files to Base64 and decode Base64 back into files.
About dtools
dtools is a collection of free online utilities designed to help developers, students and professionals perform common tasks quickly and securely. All tools run entirely in your browser, ensuring privacy and speed.
The website is built entirely with static pages and does not perform any HTTP requests to external servers when using the tools, making all operations local and secure.