Tool Name
Tool description
About Our Tools
Every tool below runs entirely in your web browser. No file ever leaves your device, no account is required, and there is no cost — ever.
Image Converter — JPG, PNG, WebP
Convert images between the three most common web formats: JPEG, PNG, and WebP. JPEG is best for photographs and images with lots of colors. PNG is ideal when you need a transparent background or lossless quality. WebP is a modern format developed by Google that produces smaller file sizes than both JPEG and PNG at comparable quality — making it perfect for websites and apps that need fast load times.
Simply drop your image onto the tool, select your target format, adjust the quality slider if needed, and download the result. Batch conversion is supported — you can convert multiple images at once.
HEIC to JPG Converter
HEIC (High Efficiency Image Container) is the default photo format used by iPhones running iOS 11 and later. While HEIC files are smaller than JPEGs at the same quality, they aren't supported by most Windows computers, Android phones, or websites. Our HEIC to JPG converter solves that problem instantly.
Drop your iPhone photos directly into the tool and download standard JPG files that work everywhere. Batch conversion is fully supported — convert an entire camera roll in one go without any uploads or account required.
Image Compressor
Large image files slow down websites, fill up storage, and take longer to send. Our image compressor lets you reduce file size while keeping quality as high as possible. Use the quality slider to find the right balance between file size and visual fidelity — most images can be compressed to 30–50% of their original size with no noticeable quality loss.
The compressor works with JPG and PNG files and shows you a live preview alongside the original so you can compare before downloading.
Images to PDF
Need to combine several photos or screenshots into a single document? Our Images to PDF tool lets you select multiple images, arrange them in the order you want, and download a single PDF containing all of them. This is perfect for creating a photo album, sending scanned documents, or combining screenshots into a shareable report.
Supports JPG, PNG, WebP, and HEIC files. All processing happens in your browser — the resulting PDF is generated locally and downloaded directly to your device.
Base64 Encoder / Decoder
Base64 is an encoding scheme that converts binary data — or any text — into a sequence of printable ASCII characters. It is widely used in web development to embed images directly into HTML and CSS, to encode email attachments, to store binary data in JSON, and to pass data through systems that only accept plain text.
Paste your text into the encoder to convert it to Base64, or paste a Base64 string into the decoder to retrieve the original text. The tool handles all Unicode characters correctly, including emoji and non-Latin scripts.
Hex Converter
The hexadecimal (hex) number system uses base 16 — digits 0–9 plus letters A–F — to represent binary data. Hex encoding is commonly used in programming, debugging, cryptography, and networking. Each byte of data is represented as two hex characters, making it easy to inspect raw binary data in a human-readable form.
Enter any text to see its hexadecimal byte representation, or paste hex values to decode them back to readable text. Useful for developers working with binary protocols, file formats, or cryptographic data.
URL Encoder / Decoder
URLs can only contain a limited set of characters. Spaces, special characters, and non-ASCII letters must be percent-encoded — replaced with a % sign followed by two hexadecimal digits — before being included in a URL. For example, a space becomes %20 and an ampersand becomes %26.
Use the URL encoder to make any text safe to include in a web address, or the decoder to convert a percent-encoded URL back to plain text. Essential for developers building APIs, handling query strings, or debugging web requests.
Color Converter — HEX, RGB, HSL
Colors in web design are expressed in several different formats. HEX codes (like #1565C0) are the most common in HTML and CSS. RGB (Red, Green, Blue) values are used in image editing and CSS. HSL (Hue, Saturation, Lightness) is a more intuitive format that makes it easy to create color variations — for example, adjusting only the lightness to create a hover state.
Enter a color in any format — pick it with the color picker, type a HEX code, or enter RGB or HSL values — and the tool instantly converts it to all three formats. A preview swatch and a palette of related color variations are displayed as well.
Steganography Tool
Steganography is the practice of hiding a secret message inside an ordinary-looking file so that the existence of the message is concealed. Unlike encryption, which scrambles data so it looks obviously hidden, steganography hides data in plain sight. Our tool uses LSB (Least Significant Bit) encoding to embed a text message into the pixel data of a PNG image. The change to the image is invisible to the human eye.
To hide a message: upload a PNG, type your secret text, and download the resulting image — it looks identical to the original but contains your hidden message. To reveal a message: upload a PNG that was previously encoded with this tool and the hidden text will be extracted and displayed. All processing happens locally in your browser.
How It Works
ConvertoFile uses your browser's built-in capabilities to process files directly on your device. Nothing is ever sent to a server.
1. Pick a Tool
Choose from 9 free conversion tools. No sign-up required.
2. Drop Your File
Drag & drop or click to browse. Files stay in your browser.
3. Convert
Click convert and get your result in seconds. Completely free.
4. Download
Save your converted file directly to your device.
All file processing on ConvertoFile happens entirely in your web browser using JavaScript APIs. Your files are never uploaded to any server, never stored, and never shared. The moment you close your browser tab, all data is gone.
Frequently Asked Questions
Answers to the most common questions about ConvertoFile and how our tools work.
How do I convert a PNG to JPG for free without uploading it anywhere?
Use ConvertoFile's Image Converter. Open the tool, drop your PNG file onto the upload area, select JPG as the output format, and click Convert. Your file is converted instantly inside your browser using the HTML5 Canvas API — nothing is uploaded to any server. Download the resulting JPG directly to your device. The whole process takes under ten seconds and is completely free with no account required.
How do I open HEIC photos from my iPhone on a Windows PC or Android phone?
The easiest way is to convert them to JPG first. iPhones shoot in HEIC format by default because it's more efficient than JPG, but Windows and Android don't support it natively. Use the HEIC to JPG converter on ConvertoFile — drop your .heic files in, and download standard JPG files that open on any device, in any app, without installing anything extra. You can convert an entire batch at once. Alternatively, on your iPhone you can go to Settings → Camera → Formats and switch to "Most Compatible" to shoot in JPG instead of HEIC going forward.
What is the difference between JPG, PNG, and WebP — which should I use?
Use JPG for photos and images with many colors — it produces small files but applies lossy compression, meaning a tiny amount of quality is lost each save. Use PNG when you need a transparent background, or when sharpness matters more than file size (logos, screenshots, diagrams). Use WebP when you're publishing images on a website and want the smallest possible file size — WebP is typically 25–35% smaller than JPG at the same visual quality and also supports transparency. All modern browsers support WebP. For everyday sharing and email, JPG is usually the right choice.
How do I reduce an image file size without losing visible quality?
Use the Image Compressor on ConvertoFile. Set the quality slider to 80–85% — at this setting most photos shrink by 60–70% with no difference visible to the naked eye. For images you'll print, stay at 90%+. For web thumbnails or social media, 75% is fine. If your image is a PNG and you want lossless compression, the best option is usually converting it to WebP instead, which achieves smaller sizes without any quality compromise. Preview the result before downloading to confirm you're happy with it.
How do I combine multiple photos into one PDF for free?
Use the Images to PDF tool on ConvertoFile. Select all the photos you want to include (JPG, PNG, WebP, or HEIC), drag them into the order you want, and click Generate PDF. A single PDF containing all your images is created in your browser and downloaded to your device. No server, no account, no cost. This is useful for combining scanned documents, sending multiple screenshots as one file, or creating a simple photo album PDF.
What is Base64 encoding and when would I need it?
Base64 is a way of converting any data — including images and binary files — into a string of plain text characters. You need it when a system can only handle text but you need to send binary data through it. The most common situations: embedding an image directly into an HTML or CSS file as a data URI (so you don't need a separate image file), encoding email attachments, passing data through a JSON API, or storing a small image in a database field. If you've seen a URL or string starting with "data:image/png;base64,iVBOR..." — that's Base64.
What is the difference between Base64 encoding and hex encoding?
Both Base64 and hex (hexadecimal) are ways of representing binary data as text, but they work differently and are used in different contexts. Hex uses 16 characters (0–9 and A–F) and represents each byte as exactly two characters — making it very easy to read and debug at the byte level. Developers use hex to inspect file headers, checksums, color codes, and network packets. Base64 uses 64 characters and is about 33% more compact than hex, making it better for transmitting larger data payloads. Use hex when you need human-readable byte inspection; use Base64 when you need to embed binary data in text-based systems efficiently.
How do I hide a secret message inside an image?
Use the Steganography tool on ConvertoFile. Upload a PNG image, type your secret message in the text box, and click Hide Message. The tool encodes your text into the pixel data of the image using LSB (Least Significant Bit) steganography — each character is stored by changing the last binary digit of pixel color values by 1, which is completely invisible to the human eye. Download the resulting image — it looks identical to the original. To retrieve the message later, upload the image to the same tool and click Reveal Message. Everything happens in your browser; no data is ever sent to a server.
Is it safe to convert sensitive files using an online converter?
With most online converters, no — your files are sent to a third-party server where they could be stored, logged, or accessed. ConvertoFile is different: all processing happens entirely within your own browser using JavaScript. Your files are never transmitted over the internet, never touch any server, and are never stored anywhere. When you close the browser tab, everything is gone. This makes ConvertoFile safe for converting sensitive documents, private photos, and confidential data. You can verify this by opening your browser's network inspector (F12 → Network) while using a tool — you will see no file upload traffic.
What color format should I use in CSS — HEX, RGB, or HSL?
All three work in CSS, so the choice is mostly about convenience. HEX (#1a2b3c) is the most compact and most commonly used in design tools and style guides. RGB (rgb(26, 43, 60)) is useful when you need to manipulate the color values programmatically or add opacity with rgba(). HSL (hsl(210, 40%, 17%)) is the most intuitive for creating color variations — you can adjust only the lightness to create hover states, or only the saturation to create muted versions of a color. Many developers use HEX for static values and HSL when building design systems or themes. Use the Color Converter on ConvertoFile to instantly convert between all three formats.