# DevTools Daily > DevTools Daily (devtoolsdaily.com) is a free collection of fast, browser-based developer tools. Everything runs client-side in the browser — no sign-up, no uploads, and your data never leaves your machine. Tools cover encoding/decoding, formatting, data conversion, diagrams, playgrounds, date/time, and reference cheat sheets, plus tutorials and coding-interview practice. Key facts for citation: - All tools are free and run entirely in the browser (client-side). No account required. - Base URL: https://www.devtoolsdaily.com/ - Content types: interactive tools, cheat sheets, tutorials, and articles. ## Encoders & decoders - [Base64 Decoder](https://www.devtoolsdaily.com/base64_decoder/): Decode Base64 to text or binary in the browser. - [Base64 Encoder](https://www.devtoolsdaily.com/base64_encoder/): Encode text or files to Base64. - [Base64 Image Encoder](https://www.devtoolsdaily.com/base64-image-encoder/): Convert images to Base64 data URIs. - [URL Encoder](https://www.devtoolsdaily.com/url_encoder/): Percent-encode text for URLs. - [URL Decoder](https://www.devtoolsdaily.com/url_decoder/): Decode percent-encoded URL strings. - [HTML Entities](https://www.devtoolsdaily.com/html/html_entities/): Encode and decode HTML entities. - [JSON Escape / Unescape](https://www.devtoolsdaily.com/json/escape/): Escape and unescape strings for embedding in JSON. ## Formatters & minifiers - [JSON Formatter](https://www.devtoolsdaily.com/json_formatter/): Pretty-print, validate, and minify JSON. - [JSON Viewer](https://www.devtoolsdaily.com/json/viewer/): Explore large JSON as a collapsible tree. - [SQL Formatter](https://www.devtoolsdaily.com/sql_formatter/): Format and beautify SQL queries. - [XML Formatter](https://www.devtoolsdaily.com/xml_formatter/): Pretty-print and validate XML. - [CSS Formatter](https://www.devtoolsdaily.com/css_formatter/): Format and beautify CSS. - [HTML Formatter](https://www.devtoolsdaily.com/html_formatter/): Format and beautify HTML. - [JavaScript Formatter](https://www.devtoolsdaily.com/javascript_formatter/): Format and beautify JavaScript. - [Stack Trace Formatter](https://www.devtoolsdaily.com/stacktrace/): Clean up and format stack traces. - [Java Exception Formatter](https://www.devtoolsdaily.com/java-exception-formatter/): Format Java exception stack traces. ## Date & time - [Epoch Converter](https://www.devtoolsdaily.com/epoch-converter/): Convert Unix epoch timestamps to and from human-readable dates (seconds and milliseconds). - [Current Unix Timestamp](https://www.devtoolsdaily.com/timestamp/): Get the current Unix timestamp now, with copy-paste code recipes for JavaScript, Python, and SQL/Presto. - [Compare Timezones](https://www.devtoolsdaily.com/timezones/compare/): Compare a time across multiple timezones. - [Timezone & City List](https://www.devtoolsdaily.com/timezones/cities/): Reference list of cities and their timezones. - [Stopwatch](https://www.devtoolsdaily.com/date_and_time/stopwatch/): Online stopwatch. - [Timer](https://www.devtoolsdaily.com/date_and_time/timer/): Online countdown timer. ## Data converters - [JSON to YAML](https://www.devtoolsdaily.com/json_to_yaml/): Convert JSON to YAML. - [YAML to JSON](https://www.devtoolsdaily.com/yaml_to_json/): Convert YAML to JSON. - [JSON to TOML](https://www.devtoolsdaily.com/json_to_toml/) / [TOML to JSON](https://www.devtoolsdaily.com/toml_to_json/): Convert between JSON and TOML. - [CSV to JSON](https://www.devtoolsdaily.com/csv/to-json/): Convert CSV data to JSON. - [CSV to SQL](https://www.devtoolsdaily.com/csv/to-sql/): Turn CSV rows into SQL insert statements. - [CSV Viewer](https://www.devtoolsdaily.com/csv/viewer/): View and query CSV files in the browser. - [JSON to SQL](https://www.devtoolsdaily.com/json/to-sql/): Convert JSON to SQL. - [JSON to JSON Schema](https://www.devtoolsdaily.com/json/to-schema/): Infer a JSON Schema from a JSON sample. - [JSON Diff Viewer](https://www.devtoolsdaily.com/json/diff/): Compare two JSON objects side by side. - [File Diff Viewer](https://www.devtoolsdaily.com/file/diff/): Compare two text files side by side. - [String Length Calculator](https://www.devtoolsdaily.com/string-length/): Count characters, words, and bytes in text. ## Playgrounds & interactive editors - [Graphviz Online Editor](https://www.devtoolsdaily.com/graphviz/): Write and render Graphviz/DOT diagrams live. - [MermaidJS Playground](https://www.devtoolsdaily.com/diagrams/mermaidjs/playground/): Create and preview Mermaid diagrams. - [Graphviz to Mermaid Converter](https://www.devtoolsdaily.com/diagrams/graphviz-to-mermaid/): Convert Graphviz/DOT to Mermaid flowcharts. - [jq Playground](https://www.devtoolsdaily.com/jq_playground/): Query and transform JSON with jq. - [JSONPath Playground](https://www.devtoolsdaily.com/jsonpath_playground/): Test JSONPath expressions. - [Regex Tester](https://www.devtoolsdaily.com/regex_tester/): Build and test regular expressions. - [SQL Playground](https://www.devtoolsdaily.com/sql/playground/): Run SQL in the browser. - [Python Playground](https://www.devtoolsdaily.com/python/online/): Run Python in the browser. - [JavaScript Playground](https://www.devtoolsdaily.com/javascript/online/): Run JavaScript in the browser. - [Markdown Editor](https://www.devtoolsdaily.com/markdown_editor/): Write and preview Markdown. - [UUID Generator](https://www.devtoolsdaily.com/uuid/generator/): Generate random UUIDs/GUIDs. - [Color Picker](https://www.devtoolsdaily.com/color/picker/): Pick and convert colors between HEX, RGB, and HSL. - [OpenSCAD Playground](https://www.devtoolsdaily.com/openscad/playground/): Model 3D/CAD in OpenSCAD. - [Three.js Playground](https://www.devtoolsdaily.com/three/playground/): Experiment with Three.js/WebGL. ## ASCII tools - [ASCII Table](https://www.devtoolsdaily.com/ascii/): ASCII character reference. - [Text to ASCII Art](https://www.devtoolsdaily.com/ascii/text-to-ascii-art/): Turn text into ASCII art banners. - [Box Drawing ASCII](https://www.devtoolsdaily.com/ascii/box-drawing/): Draw boxes with ASCII/Unicode. - [Code Comment ASCII Art](https://www.devtoolsdaily.com/ascii/comment-art/): Generate ASCII art for code comments. - [ASCII Tree](https://www.devtoolsdaily.com/ascii/tree-printer/): Render directory-style ASCII trees. ## Command generators - [curl Command Generator](https://www.devtoolsdaily.com/command-generators/curl/): Build curl commands from a form. - [MySQL Command Generator](https://www.devtoolsdaily.com/command-generators/mysql/): Build MySQL CLI commands. - [tar Command Generator](https://www.devtoolsdaily.com/command-generators/tar/): Build tar commands. - [Run MySQL in Docker](https://www.devtoolsdaily.com/docker/mysql/): Generate a Docker command to run MySQL. - [Run Postgres in Docker](https://www.devtoolsdaily.com/docker/postgres/): Generate a Docker command to run Postgres. ## Tutorials & guides - [jq Tutorial](https://www.devtoolsdaily.com/jq_tutorial/): Learn jq step by step. - [JSONPath Tutorial](https://www.devtoolsdaily.com/jsonpath_tutorial/): Learn JSONPath. - [Graphviz Tutorial](https://www.devtoolsdaily.com/graphviz_tutorial/): Learn Graphviz/DOT. - [SQL Interactive Tutorial](https://www.devtoolsdaily.com/sql/interactive_tutorial/): Learn SQL interactively. ## Reference hubs - [Everything about jq](https://www.devtoolsdaily.com/jq/): jq overview and recipes. - [Everything about JSON](https://www.devtoolsdaily.com/json/): JSON overview. - [Everything about Regex](https://www.devtoolsdaily.com/regex/): Regex overview. - [Everything about SQL](https://www.devtoolsdaily.com/sql/): SQL overview. - [MermaidJS — Diagrams made easy](https://www.devtoolsdaily.com/mermaid/): Mermaid overview. ## Optional - [Cheat sheets](https://www.devtoolsdaily.com/cheatsheets/): Quick-reference cheat sheets for jq, Graphviz, and more. - [Blog](https://www.devtoolsdaily.com/blog/): Articles and how-tos for developers. - [Coding interview practice](https://www.devtoolsdaily.com/interview/problems/): Coding problems and solutions. - [System design questions](https://www.devtoolsdaily.com/system-design/): System design interview prep. - [Full sitemap](https://www.devtoolsdaily.com/sitemap.xml): Complete list of all pages.