Free File & Data Tools
Resize and convert images, choose suitable file formats, clean JSON, transform CSV data, encode text, and generate unique identifiers.
File and Data Tools for Images and Structured Data
Choose a focused tool for image preparation, file-format decisions, structured-data conversion, markup, encoding, or developer identifiers.
File Confusion Fixer
Choose a practical file format, resolution, DPI, color mode, and export setting for printing, websites, documents, uploads, or production. Choose the Right File Format → Image ToolImage Resizer & Converter
Resize JPG, PNG, and WebP dimensions for websites, shops, documents, email, and social platforms. Resize an Image → Image ConverterImage Converter
Convert JPG, PNG, and WebP images in your browser and adjust output quality where supported. Convert Image Files → JSON ToolJSON Formatter and Validator
Format, validate, beautify, or minify JSON so objects, arrays, API responses, and configuration data are easier to inspect. Format and Validate JSON → Data ConverterJSON to CSV Converter
Turn a JSON array of objects into spreadsheet-friendly CSV rows and columns. Convert JSON to CSV → Data ConverterCSV to JSON Converter
Convert straightforward CSV tables into formatted JSON arrays for apps, APIs, scripts, testing, and imports. Convert CSV to JSON → Markup ConverterMarkdown to HTML Converter
Turn basic Markdown headings, lists, emphasis, and links into HTML for websites, documentation, and CMS editors. Convert Markdown to HTML → URL ToolURL Encoder/Decoder
Encode spaces, symbols, query values, and special characters for URLs, or decode percent-encoded strings. Encode or Decode a URL → Encoding ToolBase64 Converter
Encode readable text into Base64 or decode a Base64 string for development, documentation, and testing. Encode or Decode Base64 → Developer ToolUUID Generator
Generate random UUID v4 and GUID-style identifiers for databases, apps, API testing, filenames, records, and mock data. Generate a UUID →Need a Different Kind of Free Online Tool?
Browse every Designs24hr tool for writing, careers, text, SEO, design, marketing, planning, and everyday digital tasks.
Latest AI Safety, Privacy & Trust Guides
Read the three newest practical guides about AI safety, privacy, scams, misinformation, connected access, and responsible tool use.
AI Safety, Privacy & Trust AI Browser Checklist
Review browser access, downloads, website instructions, connected accounts, and recovery steps before using AI browsing features. Read the Guide → AI Safety, Privacy & Trust AI Agent Safety Checklist
Check what an AI agent can read, copy, upload, edit, delete, share, or export before connecting files, apps, and workspaces. Read the Guide →
AI Safety, Privacy & Trust
What Not to Share With ChatGPT
Learn what sensitive personal, financial, workplace, family, and account information you should avoid sharing with ChatGPT. Read the Guide →Explore More Tool Categories
Continue with another category for professional writing, publishing, design, marketing, planning, or everyday decisions.
Frequently Asked Questions
What are file data tools?
File data tools are online utilities that help you choose, resize, convert, format, validate, encode, decode, or restructure common digital files and text-based data.
Which tool should I use for an image?
Use the File Confusion Fixer when you do not know which format or export setting is suitable. Use the Image Resizer & Converter when you need to change pixel dimensions, and use the Image Converter when you mainly need to change JPG, PNG, or WebP format.
What is the difference between resizing and converting an image?
Resizing changes an image's pixel width and height. Converting changes the file format, such as PNG to WebP or JPG. A workflow may require one operation or both.
Should I use JSON Formatter, JSON to CSV, or CSV to JSON?
Use the JSON Formatter and Validator when you already have JSON that needs validation or formatting. Use the JSON to CSV Converter for spreadsheet-style rows and columns. Use the CSV to JSON Converter to turn a table into an array of objects.
Can these converters handle every complex file?
No. Nested JSON, irregular object keys, quoted commas, malformed encoding, advanced Markdown, very large inputs, and unusual file structures may require specialized software or manual review.
Are URL encoding and Base64 encryption?
No. URL encoding and Base64 are reversible representations. Neither method provides confidentiality or encryption.
Is a UUID a password or secret token?
No. A UUID identifies a resource. It should not be treated as authentication, permission, secrecy, a password, an access token, or an encryption key.
Should I paste confidential data into these tools?
Remove passwords, authentication tokens, private keys, payment data, identity records, confidential customer information, private contracts, unreleased business material, and any data the task does not require.
Prepare and Convert Your Files With Confidence
Choose suitable formats, prepare images, validate structured data, convert common text formats, and create developer identifiers. Keep original files and review every output.
