Image Size Checker: Format, Pixels & DPI
Check an image’s format, file size, pixel dimensions, aspect ratio and recorded DPI in your browser before you upload it somewhere.
Free browser utilities
Simple tools for everyday digital problems.
Resize images, prepare documents and fix frustrating file requirements with free, straightforward browser tools.
Available now
All tools
Compress Image to Exact KB Size
Shrink a JPG, PNG or WebP image down to a target file size such as 100 KB, entirely in your browser.
Resize Photo Dimensions & File Size
Set an exact width or height in pixels for a JPG, PNG or WebP and keep its proportions, without uploading the file.
Convert WebP, PNG, JPG Online
Turn a JPG, PNG or WebP into another of those three formats in your browser, with the real output size reported after the encode.
Crop Image to Exact Pixels
Cut a JPEG, PNG or WebP down to the part you want, at the picture’s real resolution, without uploading it anywhere.
Signature Photo Resizer & PNG Tool
Crop a signature image and resize it to an exact width and height, with an optional file-size target — all inside your browser.
Combine PDF Files Free
Combine two or more PDFs into one document, in the order you choose, without uploading them anywhere.
Split PDF into Pages or Ranges
Split a PDF into separate documents — every page on its own, or by the ranges you type.
Extract Selected PDF Pages
Pull chosen pages out of a PDF into one new document, in the order you type them.
Rotate PDF Pages Permanently
Turn PDF pages upright — 90° either way or 180° — across the whole file or just the pages you name.
Convert PDF Pages to High-Res JPG
Turn PDF pages into JPG images in your own browser — every page or just the ones you name, at the resolution you choose.
Resize Image to Exact Target KB
Resize and re-encode an image until it lands under a target size such as 200 KB.
Passport Size Photo Maker Online 2x2
Crop a portrait to selected passport or visa photo dimensions, with optional positioning guides. Check the destination authority’s current requirements.
Draw Signature to Transparent PNG
Draw or write your handwritten signature and export a clean transparent PNG with zero background.
Check PDF Page Count & Specs
Read a PDF’s page count, author metadata, and exact page dimensions in millimeters and inches without opening a reader.
Combine JPG Photos into One PDF
Combine JPG or PNG images into one ordered PDF document for an application.
Delete Pages from PDF Free
Remove unwanted pages from a PDF document directly in your browser. Choose page numbers and download a clean file.
Rearrange & Sort PDF Pages Online
Organize, reorder and delete pages of a PDF visually in your browser. Fast drag-and-drop page sorting with zero uploads.
Compress PDF in Your Browser
Re-encode PDF pages as JPEG to reduce file size, with no upload and no target-size promise. See the exact before and after size before downloading.
Stamp Text & Logo Watermark on PDF
Add custom text, copyright stamps or transparent image watermarks to all pages of a PDF document without Acrobat.
Add Custom Page Numbers to PDF
Insert clean, customizable page numbers into header or footer positions across any PDF document in your browser.
Password Protect PDF File Free
Encrypt your confidential PDF files with AES-256 passwords directly inside your web browser.
Remove PDF Password & Restrictions
Unlock password-protected PDFs and remove printing or copying restrictions locally in your web browser.
Sign PDF Document Online Free
Draw, type or stamp your signature onto a PDF document in your browser. A drawn signature, not a certificate-backed cryptographic signature.
Black Out Text in PDF (Visual Cover)
Draw opaque black boxes over areas of a PDF. A visual cover only — the underlying text stays in the file.
Compare Two PDF Documents Side by Side
Compare the text of two PDF versions side by side, with changed words highlighted and every page scanned for differences.
Recover Corrupted PDF Document
Open a damaged PDF with a tolerant parser and re-save it as a fresh file. Recovery works only when the core objects survive — it is not magic for unsalvageable files.
Extract Clean Text from PDF
Pull text content out of PDF pages and export as clean Markdown or TXT format for notes, AI prompts and summaries.
Convert Word Docx to PDF Free
Extract the text of Microsoft Word (.docx) files into clean PDF pages in your browser. Text-only: images and original layout are not preserved.
Convert HTML Webpage to PDF Free
Render raw HTML code snippets or webpage content into structured, formatted PDF documents in your browser.
Add PDF/A Archive Metadata to a PDF
Write ISO 19005 pdfaid identification metadata into a PDF in your browser, and read exactly what a validated PDF/A conversion would still require.
Add Text Watermark to Photo
Stamp a custom text copyright watermark across JPG, PNG and WebP photos in your browser, with position, opacity and size controls.
Create Custom Meme Free No Watermark
Generate funny memes with top and bottom text on popular templates or your own pictures with zero watermark branding.
Blur Faces in Photo for Privacy
Protect people’s privacy by pixelating or blurring out faces, vehicle license plates and sensitive details in photos.
Remove Photo Background Client-Side
Erase a solid or simple background with a colour-tolerance slider and export a transparent PNG locally. Not an AI cutout model.
Upscale Image Resolution Bicubic
Enlarge low-resolution photos 2x or 4x with bicubic canvas interpolation in your browser. Not an AI super-resolution model — detail is resampled, not invented.
Create Animated GIF from Images
Bundle multiple JPG, PNG or WebP photos into an animated GIF with custom frame delay, speed and looping settings.
Extract All Frames from GIF to PNG
Decompress any animated GIF and download every individual frame as high-quality PNG images or a single ZIP file.
Reduce GIF File Size Under 1MB
Compress animated GIFs with palette optimization and color quantization to meet Discord, forum and email upload limits.
Fix Image for Online Application Form
One-click tool to resize, convert and compress photos and signatures to match strict job and exam portal limits.
OCR PDF — Recognize Text in Scans
Recognize text in scanned PDFs in your browser with a self-hosted English model. Per-page confidence is reported; nothing is uploaded anywhere.
Excel to PDF — Convert .xlsx Sheets
Turn an .xlsx workbook into a printable A4 PDF in your browser. Each sheet becomes a paginated table with a repeating header. Nothing is uploaded.
Flatten PDF Form Fields
Bake interactive AcroForm fields into static page content in your browser. The result opens as a plain document — no fields, no editing.
File Hash Calculator
Compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 checksums of a file in your browser and compare the result with a published checksum.
Check File Type by Bytes
Identify a file’s real format from its magic bytes, see the header values, and catch an extension that does not match the content.
Create ZIP Archive Online
Pack files or a whole folder into one .zip archive in your browser, with folder paths kept and duplicate names handled.
Extract ZIP Files Online
Open a ZIP archive in your browser, list what is inside, and download individual files or the whole set again.
Remove EXIF Data from Photo
Read the EXIF block in a JPG, PNG or WebP photo, see where it was taken, and strip the metadata without re-encoding the pixels.
Favicon Generator from Image
Centre-crop any image into a favicon.ico plus the PNG sizes browsers and phones ask for, and download them as one ZIP.
Image to Base64 Converter
Encode an image as a Base64 data URI and copy it as HTML, CSS or JSON. The bytes are read and encoded in your browser.
SVG to PNG Converter
Render SVG markup to PNG at an exact size or a scale, with transparency kept and the output dimensions shown before you download.
Image Color Palette Extractor
Pull the dominant colours out of a photo and copy them as HEX, RGB, HSL, CSS variables or JSON, with the share of pixels each one covers.
Split Image into Grid
Cut a photo into equal 2×2, 3×3 or custom grid tiles for Instagram, puzzles or print, then download every tile as one ZIP.
Add Border to Image
Add a solid colour border to a JPG, PNG or WebP photo with an exact pixel width, preview it live, and download at full resolution.
Adjust Photo Brightness & Contrast
Brighten a dark photo or fix flat contrast with live sliders, then download the adjusted image at full resolution.
Rotate & Flip Image
Turn a photo 90°, 180° or 270° clockwise, or mirror it horizontally or vertically, with a live preview and full-resolution download.
Change Image DPI
Set the print density of a JPG or PNG to 72, 150, 300 or 600 DPI by rewriting the metadata field, without resampling a single pixel.
Compare Two Images
Compare two photos pixel by pixel, see how many changed, and download a red difference map that shows where they differ.
Batch Convert Images
Convert up to 50 JPG, PNG or WebP images to one format in a single run, optionally cap the longest side, and download everything as a ZIP.
Edit PDF Metadata
View and change a PDF’s title, author, subject, keywords, creator and producer, then save a new copy in your browser.
PDF Multiple Pages per Sheet
Put 2, 4, 6 or 9 PDF pages on one sheet to save paper when printing, with each page scaled to fit its cell.
Crop PDF Pages
Trim a margin from every page of a PDF by setting the CropBox, so viewers and printers show only the area you want.
Markdown to PDF Converter
Paste Markdown or drop a .md file and download a clean PDF with headings, lists, code blocks and tables.
PDF to PNG Converter
Render PDF pages to transparent PNGs at 1× to 4× scale, then download every page individually or as one ZIP.
Extract Images from PDF
Pull the actual embedded images out of a PDF, not the rendered pages, and download each one or a ZIP of them all.
Batch Image Resizer
Resize many JPG, PNG or WebP photos to a maximum width or height, or an exact box, then download them as one ZIP.
TXT to PDF Converter
Turn plain UTF-8 text into a paginated PDF with a clean embedded font — perfect for notes, logs and drafts.
JSON Formatter & Validator
Format, minify and validate JSON in your browser, with the parser’s own error message when the input is invalid.
URL Encoder & Decoder
Encode or decode URLs and query parameters — with a clear split between component encoding and full-URL encoding.
HEIC to JPG Converter
Convert Apple HEIC or HEIF photos to standard JPG in your browser, choose the JPEG quality, and download a file that opens everywhere.
HEIC to PNG Converter
Turn an iPhone HEIC or HEIF photo into a lossless PNG in your browser. Alpha is preserved when the source has it, and nothing is uploaded.
TIFF to JPG Converter
Convert a TIFF or TIF scan to JPG in your browser. Common TIFF compressions are decoded locally, with transparency flattened onto white.
TIFF to PNG Converter
Convert a TIFF scan to lossless PNG in your browser. Alpha is kept, the orientation tag is applied, and only the first page is written.
SVG to JPG Converter
Render SVG markup to JPG at 1×, 2× or 4× its intrinsic size. Scripts and external references are stripped, and transparency becomes white.
BMP to PNG Converter
Convert a Windows BMP image to PNG in your browser. The output is lossless, smaller in most cases, and accepted by modern software.
AVIF to JPG Converter
Convert AVIF images to JPG in your browser with a quality control. Modern browsers decode AVIF locally; nothing is uploaded.
Batch Rotate Images
Rotate up to 50 JPG, PNG or WebP images by 90°, 180° or 270° in one run, then download every result as a single ZIP.
Image Grayscale Converter
Turn a colour photo into a proper luminance grayscale image in your browser, with a live preview and PNG, JPG or WebP output.
Add Padding to Image
Add exact padding around a photo or fit it into a 1:1, 4:5, 16:9 or 9:16 canvas without cropping or stretching it.
CSV to JSON Converter
Convert CSV to JSON in your browser. The header row becomes the keys, quoted fields survive, and no types are guessed or invented.
JSON to CSV Converter
Turn a JSON array of objects into a clean CSV. Nested objects are serialised into the cell instead of being dropped or mangled silently.
CSV Viewer
Open a CSV in your browser and see it as a table with column statistics — count, missing values, min, max, mean and distinct values.
YAML to JSON Converter
Convert YAML to JSON in your browser. Parse errors report the exact line and column; multi-document files are refused instead of guessed.
JSON to YAML Converter
Convert JSON to YAML in your browser with readable, stable output. Invalid JSON shows a precise error, not a best-effort guess.
YAML Formatter
Normalise YAML formatting in your browser: consistent indentation, optional key sorting, and a documented parse error when something is off.
XML Formatter
Pretty-print XML in your browser with your chosen indentation. Entities stay decoded, attributes are kept, and broken markup is reported by the parser.
XML Validator
Check whether XML is well-formed in your browser, with the parser’s line and column for the first problem it finds.
Text Case Converter
Convert text between uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, CONSTANT_CASE, kebab-case and dot.case.
HTML Entity Encoder & Decoder
Encode and decode HTML entities in your browser — named, decimal and hex references — with basic and full numeric escaping modes.
Markdown to HTML Converter
Convert Markdown to HTML in your browser. Raw HTML in the source is sanitised by default, so a paste of script tags does not survive the conversion.
HTML to Markdown Converter
Turn HTML into Markdown in your browser. Script and style elements are removed entirely; headings, lists, tables and links become Markdown equivalents.
HTML Minifier
Minify HTML in your browser: collapse whitespace, strip comments, optionally minify embedded CSS and JavaScript, and see the exact byte savings.
CSS Minifier
Minify CSS in your browser with exact byte measurements. Level 2 merging is opt-in and clearly labelled because it can reorder declarations.
JavaScript Minifier
Minify JavaScript in your browser with terser. The code is parsed, never executed; parse errors report line and column and nothing is run.
Regex Tester
Test a JavaScript regular expression against your own text in the browser. Matches are highlighted with indices, and every match plus its groups is listed.
UUID Generator
Generate RFC 4122 version 4 UUIDs in your browser, up to 100 at a time, and validate any UUID you already have — format, version and variant.
Timestamp Converter
Convert Unix timestamps to ISO, UTC and local time (and back) in your browser. Seconds and milliseconds are auto-detected, with the guess explained.
QR Code Generator
Generate a QR code in your browser from text or a URL. Choose the error-correction level and size, and download a PNG or SVG. Nothing is uploaded.
QR Code Reader
Read a QR code from an image in your browser. The decoder runs locally; the decoded payload is shown as text, never executed or opened automatically.
TAR Creator
Create a tar archive in your browser from up to 500 files. Names that escape the archive are refused, never silently re-rooted.
TAR Extractor
Open a tar archive in your browser and download its contents as a ZIP. Traversal paths, absolute paths and oversized payloads are refused.
GZIP Compressor
Compress a file to .gz in your browser. Choose level 1, 6 or 9; the output is measured byte for byte, never estimated.
GZIP Extractor
Decompress a .gz file in your browser with a hard memory budget, verified against its CRC-32 and size — corrupt files are refused, not half-written.
File Splitter
Split any file into equal-size parts in your browser. Parts download as one ZIP, numbered with natural zero padding.
File Joiner
Join split parts back into the original file in your browser. Parts order themselves by natural sort; size and SHA-256 are reported exactly.
Batch File Renamer
Rename many files with a pattern in your browser. Tokens: {name}, {ext}, {n}, {n:3}, {date}, transforms for case and word style. Downloads as ZIP.
Duplicate File Finder
Find byte-identical duplicates among your files in the browser. SHA-256 of every byte, groups listed, CSV report included.
Archive Content Inspector
Inspect a ZIP, TAR or GZIP archive without extracting: file list, sizes, compression, suspicious paths — and a refusal note for every violation.
Barcode Generator
Generate CODE128, EAN-13, EAN-8, UPC-A, CODE 39 and ITF-14 barcodes in your browser. Check digits are computed and verified for you.
PDF Grayscale Converter
Convert every page of a color PDF to grayscale in your browser, preserving vector layout and size. Good for mono printing and smaller inks.
Add Headers & Footers to PDF
Stamp a header or footer on every page of a PDF in your browser: custom text, page numbers, date — sized and positioned your way.
PDF Annotation Inspector
List every annotation in a PDF in your browser: links, highlights, notes, form widgets — with page, text and destination, exportable as CSV.
PDF Page Resize
Fit every page of a PDF onto A4, Letter, A3, A5 and more — scaled to fit, aspect ratio preserved, centered. Good for printing drafts.
PDF Page Size Inspector
See every page size in a PDF: points, millimetres, paper match, orientation and rotation — plus a mixed-size warning where it helps.
PDF Text Search
Search for text inside a PDF in your browser — every match with page, context and exact offsets. Counts included; nothing is uploaded.
PDF Form Field Inspector
List every AcroForm field in a PDF in your browser: name, type, value, read-only and required flags — exportable as CSV. Read-only.
PDF Link Extractor
Extract every link from a PDF: external URLs and internal destinations, with page and text — downloadable as CSV. Read-only.
PDF Bookmark Extractor
Extract the bookmark tree from a PDF in your browser: nested outline with titles, pages and URLs — downloadable as CSV or text. Read-only.
CSV to Excel Converter
Turn CSV into a real .xlsx workbook in your browser: parsed values preserved, column widths set from content. Nothing is uploaded.
Excel to CSV Converter
Turn an .xlsx workbook into CSV in your browser: pick the sheet, values preserved, RFC 4180 quoting. Nothing is uploaded.
What a resize actually produces
Browse by category
- ImagesCompression, resizing and file-size targets.36 available
- DocumentsPDF work and format conversion.40 available
- Application photosPortraits and signatures prepared for forms.4 available
- File checksInspect a file before you upload it.28 available
- Files & archivesZip, checksums, encoding and type detection.12 available
How these tools work
Processing happens locally
Each tool reads a file you choose through your browser’s own file APIs. The bytes are not sent to a server, so there is no upload queue and nothing to wait for.
One job per page
A tool page does the one thing its title says. Where a next step exists, it is a link to another real tool rather than a menu of upsells.
Nothing is stored about you
There are no accounts, no upload history and no tracking of file names. Advertising is planned to fund the site, and when it starts it will not appear on tool pages at all — only on content pages, where nothing about your files is in the document.
1 more utilities are in development. The tools directory lists them honestly, without links until they actually work.