Free Online File Tools

swap_horiz Convert Image

Convert images between any format — JPG, PNG, WEBP, AVIF, BMP, TIFF, ICO, and HEIC (iPhone). The converter supports batch processing: select or drag multiple files at once and convert them all in a single operation. You control the output quality with a slider, giving you precise control over the file size and quality trade-off. At 85% quality, JPG files are typically 60–75% smaller than the originals with no perceptible visual difference. WEBP output is 25–35% smaller than equivalent JPG. All conversion uses the browser's built-in Canvas API — no uploads, no server, no watermarks.

auto_fix_high Remove Background

Remove the background from any photo using AI, entirely in your browser. The tool uses U2-Net, a neural network optimized for salient object detection, running via TensorFlow.js. On first use, the model (~8 MB) is downloaded and cached — all subsequent uses are instant. The AI segments the foreground subject from the background with high accuracy, handling hair, fur, and transparent objects. Output is a PNG with a transparent background, ready to be placed over any surface. Works excellently on portraits, product photos, and animals. Because the AI runs locally, your photos never leave your device.

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download Download PNG (Transparent)

crop Crop Image

Crop images interactively with a drag-to-select interface. Draw a crop rectangle on the image, adjust the handles to fine-tune the selection, and click Apply Crop to download the result. The cropper preserves the original image quality — no re-encoding unless you export to a lossy format. Useful for removing unwanted edges from scanned documents, preparing profile photos, framing social media images to specific dimensions, and isolating subjects from wider shots. Supports JPG, PNG, WEBP, and other common formats as input.

photo_size_select_large Resize Image

Resize images to exact pixel dimensions or by percentage, with optional aspect ratio locking to prevent distortion. Enter a target width and the height adjusts automatically (or vice versa), or unlock the constraint to set both dimensions independently. Useful for preparing images for specific platform requirements: social media cover photos, website banners, email headers, and print layouts all have standard dimension requirements. The resizer uses the Canvas API for high-quality bicubic-equivalent scaling that avoids the jagged edges of nearest-neighbor scaling.

compress Compress Image

Compress JPG, PNG, and WEBP images to reduce file size without visible quality loss. The quality slider lets you find the optimal balance: at 85% quality, most photographs are 60–75% smaller with no perceptible difference on screen. Below 70% quality, compression artifacts may become visible in some images. The tool shows the original and compressed file sizes, so you can make an informed decision. Batch processing lets you compress multiple images at once. This is essential for improving website page speed scores (Core Web Vitals LCP), reducing email attachment sizes, and speeding up social media uploads.

tune Adjust Image

Adjust brightness, contrast, saturation, sharpness, and other image properties using intuitive sliders. Changes are previewed in real time as you move each slider. Useful for correcting underexposed or overexposed photos, increasing contrast for scanned documents to improve text readability, boosting color saturation for product photos, and applying basic enhancements without needing professional photo editing software. All adjustments are applied using the Canvas API's image data manipulation, preserving image quality.

copyright Add Watermark

Add text or image watermarks to photos to protect your intellectual property or brand your work. Choose the watermark position (corners, center, or custom), control opacity from subtle to bold, and set the font size and color for text watermarks. For image watermarks (logos, signatures), upload a PNG with transparency for the cleanest result. The watermark is applied client-side, and the result downloads immediately. Useful for photographers protecting their portfolio images, businesses adding logos to marketing materials, and anyone creating branded content.

filter_b_and_w Filters & Effects

Apply artistic filters and visual effects to photos: grayscale, sepia, vintage, blur, sharpen, invert, and more. Filters are applied in real time using CSS filter properties and Canvas pixel manipulation. Stack multiple filters for custom effects. Useful for creating consistent visual styles across a social media feed, preparing photos for presentations, generating artistic variations of product photos, and quickly creating black-and-white versions of color images for print or design use.

rotate_right Flip & Rotate

Rotate images 90°, 180°, or 270° clockwise, or flip horizontally and vertically with a single click. Corrects photos taken in the wrong orientation by cameras that misread sensor data. Flip horizontally to create mirror images for symmetrical compositions, or to correct text that was photographed in reverse. Flip vertically to invert an image for artistic effects or to correct upside-down scans. All transformations are lossless — the image data is mathematically transformed without re-encoding, preserving full quality.

data_object EXIF Remover & Viewer

Remove or view EXIF metadata from photos. EXIF data embedded in JPEG files can contain sensitive information: GPS coordinates of where the photo was taken, the camera model and serial number, the exact date and time the photo was captured, and sometimes even lens and exposure settings. Before sharing photos publicly — on social media, in email, or on a website — stripping EXIF data protects your privacy and prevents location tracking. The EXIF Remover removes all metadata and downloads a clean copy of the image.

code Image to Base64

Convert any image file to a Base64-encoded data URI — the format used to embed images directly in HTML, CSS, and JavaScript without separate file requests. The encoded string starts with 'data:image/jpeg;base64,' (or the appropriate MIME type) and can be used directly in an img src attribute or CSS background-image property. This technique is used in HTML email templates, single-file web apps, CSS stylesheets, and anywhere where reducing the number of HTTP requests improves performance. Base64 increases file size by approximately 33%.

web Make Favicon (ICO)

Convert any image to a favicon for your website. Modern browsers support PNG favicons at multiple sizes: 16×16, 32×32, and 48×48 pixels are the standard sizes for browser tabs, bookmarks, and taskbar icons. The tool generates all three sizes from a single source image. For maximum cross-browser compatibility — including older Internet Explorer versions — the output can also be used as an ICO file by renaming the PNG extension. SVG favicons are increasingly supported and scale perfectly at any resolution.

picture_as_pdf PDF → Images

Convert each page of a PDF document into a JPG or PNG image. Each page is rendered at 2× display resolution, producing crisp, readable output on modern high-DPI screens while keeping file sizes manageable. Useful for sharing individual document pages on social media, embedding PDF content in presentations, creating document preview thumbnails, and archiving PDFs as images for platforms that display images but not PDFs. The conversion uses Mozilla's open-source PDF.js library, which runs entirely in your browser. Multi-page PDFs are handled automatically — each page becomes a separate downloadable file.

add_photo_alternate Images → PDF

Combine multiple images into a single PDF document. Each image becomes a separate page, sized to match the image dimensions. Supports JPG, PNG, WEBP, HEIC, and other formats. Upload images in the order you want them to appear as pages — drag to reorder before generating. Useful for creating portfolios, combining scanned documents that were scanned as individual images, assembling photo books, and creating multi-page reports from screenshots. The PDF is generated using jsPDF, an open-source library that runs entirely in your browser.

merge Merge PDFs

Combine multiple PDF files into a single document. Upload PDFs in the desired page order — drag to reorder if needed — then click Merge. The combined PDF downloads immediately. Useful for assembling multi-chapter documents, combining invoices and receipts into a single statement, merging scanned pages into one document, and consolidating reports from multiple sources. The merge operation preserves all original PDF content including text, images, vector graphics, and page formatting. File size of the merged PDF is approximately the sum of the input file sizes.

content_cut Extract PDF Pages

Extract specific pages from a PDF, or split a PDF into individual pages. Enter page numbers or ranges (e.g., '1-3, 5, 7-9') to extract exactly the pages you need. Useful for pulling out specific sections from long reports, separating invoices from a combined statement, extracting individual chapters from a document, or creating a smaller PDF from a large one. The extraction preserves all original content on the selected pages. The remaining pages are not modified — only the extracted pages are downloaded.

qr_code_2 QR Code Generator

Generate high-resolution QR codes from any text, URL, email address, phone number, Wi-Fi credentials, or plain text. Customize the foreground and background colors to match your brand identity. Download as PNG for print or digital use. QR codes have become a standard way to bridge print and digital — business cards, product packaging, restaurant menus, event posters, and retail displays all commonly use QR codes for instant mobile access to links. The generator uses qrcode.js, an open-source library that runs locally.

palette Color Palette Extractor

Extract the dominant colors from any image as HEX, RGB, and HSL values. Upload a photo, logo, illustration, or screenshot, and the tool analyzes the pixel data to identify the most prominent colors. Copy any color value with a single click. Invaluable for designers matching a brand's visual identity to a photograph, developers building UI color schemes inspired by reference imagery, artists analyzing the palette of a reference painting, and anyone creating cohesive visual designs from photographic sources.

colorize Color Picker & Converter

An interactive color picker that displays the selected color's value in HEX, RGB, HSL, and CMYK formats simultaneously. Use the color wheel and sliders to select any color visually, or enter a known value in any format to convert it to the others. Copy any format with one click. Eliminates the need to memorize color format conversion formulas. Used daily by web developers who need CSS color values, graphic designers converting between print (CMYK) and digital (RGB) color spaces, and anyone working with color codes.

gradient CSS Gradient Generator

Build linear or radial CSS gradients with a visual editor and copy the generated CSS code. Add as many color stops as you need, drag them to adjust positions, and see the gradient rendered in real time. Change the direction (for linear) or shape (for radial) with dropdown controls. The tool outputs standard CSS gradient syntax compatible with all modern browsers. Useful for frontend developers creating custom backgrounds, UI designers prototyping gradient styles, and anyone who needs CSS gradient code without memorizing the syntax.

lock Password Generator

Generate cryptographically secure random passwords using the browser's Web Crypto API (window.crypto.getRandomValues). Unlike pseudo-random number generators, this API produces values that are computationally indistinguishable from true randomness, making the passwords resistant to prediction attacks. Control password length (8–128 characters) and character set: uppercase letters, lowercase letters, digits, and special symbols, in any combination. The generated password is displayed only in your browser and never transmitted to any server. No usage logging.

data_object JSON Formatter & Validator

Validate, format (pretty-print), and minify JSON data. Paste any JSON string and the tool instantly validates it — if there is a syntax error, the exact line and character position is highlighted. The pretty-print mode formats the JSON with proper indentation and line breaks for readability. The minify mode removes all whitespace to produce compact JSON for production use or API payloads. Supports nested objects and arrays of any depth and complexity. Useful for developers debugging API responses, data engineers cleaning data exports, and anyone working with JSON configuration files.

article Word Counter & Text Analyzer

Paste or type text to get word count, character count, reading time, and more.

abc Base64 Text Encoder / Decoder

Encode any plain text string to Base64 format, or decode a Base64 string back to its original text. Handles UTF-8 characters correctly, including accented characters, Chinese, Arabic, and other non-ASCII text. Base64 is used in HTTP Basic Authentication headers, JWT tokens, MIME email encoding, data URIs, and dozens of other standards where binary-safe text encoding is required. Useful for developers debugging encoded data, understanding authentication tokens, and working with APIs that accept Base64-encoded inputs.

link URL Encoder / Decoder

Encode special characters in URLs (converting spaces, accented letters, and symbols to percent-encoded format like %20 for space) or decode percent-encoded strings back to readable text. Percent-encoding is required for characters that have special meaning in URL syntax — spaces, ampersands, equals signs, and others. This tool is essential for building API query strings, debugging URL encoding issues, creating properly formatted links with special characters in the path or query parameters, and understanding how browsers encode form submissions.

tag Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes from any text input, using the browser's native Web Crypto API. All computation is local — no data is sent to any server. Useful for verifying that a downloaded file has not been tampered with (by comparing its hash to the publisher's published hash), generating unique identifiers from text, understanding how one-way hashing works, and checking password storage implementations. Note: MD5 and SHA-1 are considered cryptographically weak for security purposes; use SHA-256 or SHA-512 for security-critical applications.

text_fields Markdown → HTML Converter

Convert Markdown-formatted text to clean, semantic HTML. Preview the rendered output in real time as you type. Supports full CommonMark Markdown syntax: headings (# to ######), bold (**text**), italic (*text*), links, images, blockquotes, code spans and blocks, unordered and ordered lists, horizontal rules, and tables. Copy the generated HTML for use in blogs, documentation systems, CMS platforms, email templates, or any other context that accepts HTML. Useful for writers, technical authors, documentation engineers, and anyone who prefers writing in Markdown but needs HTML output.

manage_search Regex Tester

Test regular expressions in real time against any input text. All matches are highlighted as you type the pattern, with the match count shown. Supports all JavaScript RegExp syntax including character classes, quantifiers, groups, lookahead and lookbehind assertions, and flags (global /g, case-insensitive /i, multiline /m, dotAll /s). Useful for developers writing input validation patterns, data engineers extracting structured data from text, system administrators parsing log files, and anyone learning regular expression syntax through interactive experimentation.

conversion_path Unit Converter

Convert between common units of measurement: length (meters, feet, inches, yards, miles, centimeters, kilometers, nautical miles), weight (kilograms, pounds, ounces, grams, metric tons, stone), temperature (Celsius, Fahrenheit, Kelvin), area (square meters, square feet, acres, hectares), speed (km/h, mph, knots, m/s), and data storage (bytes, KB, MB, GB, TB, PB). Results update instantly as you type. Useful for engineers, scientists, travelers, students, and anyone working with international measurements or unit conversions in daily life.

aspect_ratio Aspect Ratio Calculator

Calculate aspect ratios and find scaled dimensions for any resolution. Perfect for video, photos, and UI design.

contrast Color Contrast Checker

Check if your foreground/background color combination meets WCAG AA and AAA accessibility standards.

AA requires 4.5:1 (normal text) or 3:1 (large/bold). AAA requires 7:1.

add_photo_alternate Images → PDF

Combine multiple images into a single PDF document. All images are added as separate pages in the order you upload them.

timer Pomodoro Timer

A fully featured Pomodoro timer implementing the classic productivity technique developed by Francesco Cirillo in the 1980s. The default configuration is 25-minute focus sessions (pomodoros) alternating with 5-minute short breaks, with a longer 15-minute break after every four pomodoros. This rhythm is designed to maintain high concentration while preventing mental fatigue. The timer tracks your completed pomodoros and plays a notification sound at the end of each session. Research consistently shows that structured work intervals with forced breaks improve focus, reduce procrastination, and sustain productivity over long working sessions.

notes Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text for mockups, wireframes, design templates, and development environments. Choose the output quantity in paragraphs, sentences, or words. The classic Lorem Ipsum text is derived from Cicero's 'de Finibus Bonorum et Malorum' (45 BC) — a philosophical treatise that has been used as printing and typesetting placeholder text since the 1500s. Its nonsensical Latin appearance helps designers focus on visual layout without being distracted by real content during the design phase. The generated text is ready to copy into any design tool or development environment.

text_format Conversor de Capitalização

Convert text between case styles with a single click: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE. Useful for developers normalizing variable and function names to match codebase conventions, writers formatting titles and headings consistently, copywriters preparing text for social media or advertising where specific capitalization is required, and anyone who needs to reformat large amounts of text without manual editing. Process entire paragraphs or code blocks at once.

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difference Text Diff Checker

Compare two blocks of text and see exactly what changed between them. Added text is highlighted in green, removed text in red, making differences immediately obvious. Useful for reviewing document revisions, comparing two versions of a configuration file, spotting changes between API responses in testing, reviewing edited content before publishing, and identifying unintended changes in code or text. The diff algorithm identifies the minimum set of changes required to transform one text into the other (Longest Common Subsequence algorithm).

gradient CSS Gradient Builder

Build beautiful multi-stop CSS gradients with a live preview. Copy the ready-to-use CSS code.

calculate Conversor de Bases Numéricas

Converta entre Decimal, Binário, Hexadecimal e Octal em tempo real.