250 × 250 Image Resizer
Create a 250 × 250 pixel PNG. Fill the square by cropping or fit the whole image with a background.
Open toolFree Online Image Tools & Calculators
Edit images and use free calculators for unit conversions, battery runtime, grades and tips. Work in your browser with formulas, examples and clear limits.
/
Background Remover
Remove image backgrounds with AI, refine edges using erase and restore brushes, change the backdrop and export transparent PNG or WebP with Toolinet.
Open toolBattery Runtime Calculator
Estimate battery runtime from Ah or Wh, voltage, load, efficiency, depth of discharge and health, with optional Peukert correction.
Open toolBulk Image Resizer
Resize up to 100 images to fit maximum width and height. Export PNG, JPEG or WebP individually or as a ZIP.
Open toolDDS to PNG Converter
Convert DDS textures in DXT1, DXT3, DXT5 or standard uncompressed BGRA32 format to PNG.
Open toolDress Length by Height Calculator
Estimate shoulder-to-hem length for a chosen floor clearance.
Open toolDrill Tip Length Calculator
Estimate conical drill point length and the tip depth for a full-diameter hole.
Open toolEffective Labor Rate Calculator
Calculate revenue per billed hour or reverse-solve a target.
Open toolGutter Slope Calculator
Find the vertical drop, run, or pitch toward the downspout.
Open toolHaircut Tip Calculator
Calculate a haircut or salon tip, include tax and deposits, compare a fixed or percentage tip and split the amount across staff.
Open toolHours to Decimal Calculator
Convert hours and minutes to decimal hours, or convert back to a duration.
Open toolImage Compressor
Use Toolinet’s free image compressor to reduce JPG, PNG and WebP file sizes. Compare quality, process up to 20 images and download optimized files or a ZIP.
Open toolImage Cropper
Crop JPG, PNG and WebP images with a live preview. Choose an aspect ratio, set pixel dimensions, rotate or flip, and download the crop with Toolinet.
Open toolImage Format Converter
Convert JPG, PNG, WebP, AVIF, GIF, BMP and SVG images privately in your browser. Batch convert, resize, control quality and download a ZIP.
Open toolImage Resizer
Resize JPG, PNG and WebP images by pixels or percentage. Keep proportions, crop to fill or add padding, preview dimensions and download with Toolinet.
Open toolImage Splitter
Split an image into rows and columns and download PNG tiles individually or in a ZIP.
Open toolJPEG Resizer
Resize a JPEG image by width, height or percentage. Keep its aspect ratio to avoid distortion.
Open toolLabor Percentage Calculator
Find labor cost as a percentage of sales or calculate a target budget.
Open toolm³/h to CFM Converter
Convert m³/h to CFM or back, process a list and compare L/s and L/min. Uses the international foot definition.
Open toolm³/h to GPM Converter
Convert m³/h to US or Imperial GPM in either direction. Keep gallon standards explicit and export bulk conversions.
Open toolMetres per Minute to SFM Converter
Convert machining surface speed in either direction.
Open toolMHz to ns Converter
Convert MHz to a single-cycle period in nanoseconds or ns back to MHz. Calculate the elapsed time for multiple cycles and export a list.
Open toolNecktie Length Calculator
Estimate a necktie shopping length range from height, neck size and knot style. Compare centimetres and inches, then check the tied fit.
Open toolPassport Photo Maker
Prepare passport photos with live crop preview, size presets and print sheets. Set pixels, choose 300 or 600 DPI and download JPG or PNG with Toolinet.
Open toolPNG Cropper
Crop a PNG using X, Y, width and height, or drag a selection on the preview.
Open toolPNG Resizer
Resize a PNG image by width, height or percentage. Keep its aspect ratio to avoid distortion.
Open toolPNG to DDS Converter
Convert PNG to an uncompressed 32-bit BGRA DDS texture, preserving transparency.
Open toolPrice per Pound to Price per Kilogram Converter
Convert a unit price or compare two offers in the same currency.
Open toolRPM to FPM Calculator
Convert RPM to feet per minute using wheel diameter, or reverse FPM to RPM. See metric surface speed and a comparison table.
Open toolShelf Spacing Calculator
Calculate even clear gaps and mark the bottom edge of each shelf.
Open toolSki Boot Size Calculator
Estimate Mondopoint from the longer foot.
Open toolSquare Root Curve Calculator
Curve one score or a class list with a square root or adjustable power curve. Compare averages, find target scores and export results.
Open toolSVG Cropper
Trim empty SVG canvas by fitting the viewBox to measurable artwork. Download the result as SVG.
Open toolTattoo Tip Calculator
Calculate a tattoo tip from the full service price, account for a credited deposit and tax, round the tip and split payment evenly.
Open toolWebP to PNG Converter
Convert a WebP image to PNG while keeping available transparency.
Open toolWords Correct per Minute Calculator
Calculate words correct per minute, raw WPM and reading accuracy from attempted words, errors and seconds. Includes a stopwatch.
Open toolNo matching tools. Try another search.
Calculators for everyday questions
Explore unit conversions, battery runtime, reading fluency, grade curves and tipping calculations. Each calculator explains its method, worked example and limits. Check units and assumptions before using a result.
Free image tools for everyday work
Use Toolinet to prepare images for websites, online forms and personal projects. Choose an image compressor, resizer, cropper, background remover or passport photo maker.
Choose the right tool
Crop to frame your subject, resize to the dimensions you need, then compress to reduce file size. Use the background editor for cutouts and the passport photo maker to prepare an ID photo layout.
Check before you download
Keep your original files and review the output at its intended size. Compression can reduce detail. Passport photo requirements vary, and creating a photo does not guarantee official acceptance.
Files stay on your device
Image processing runs in your browser. Use a recent browser with JavaScript enabled and enough available memory. AI background removal downloads model assets on first use and may require more time on slower devices.
Simple tools for everyday work.
Edit images and use free calculators for unit conversions, battery runtime, grades and tips. Work in your browser with formulas, examples and clear limits.